Why is my WRT610 sending IPv6 router advertisements?

Set up my new WRT610N over the weekend. Generally working ok, but I'm having trouble with my IPv6 tunnel setup. Started seeing a new prefix show up on my inside boxes, one that is in the IPv6 6to4 range, and appropriate for my external IP address. Do a little digging with a packet sniffer, and it looks like the 610N is sending out Router Advertisements every 10 seconds or so advertising the 6to4 IPv6 prefix and itself as a IPv6 router. Anyone else see this? Is there a way to turn it off?
OK, Bonus points to Linksys for having some v6 support, but it'd be nice if there were some knobs to adjust it or turn it off.
System is running firmware 1.00.00 B18. Here's the text of the packet capture:
Ethernet II, Src: Cisco-Li_62:99:40 (00:22:6b:62:99:40), Dst: IPv6mcast_00:00:00
:01 (33:33:00:00:00:01)
    Destination: IPv6mcast_00:00:00:01 (33:33:00:00:00:01)
        Address: IPv6mcast_00:00:00:01 (33:33:00:00:00:01)
        .... ...1 .... .... .... .... = IG bit: Group address (multicast/broadcast)
        .... ..1. .... .... .... .... = LG bit: Locally administered address (this is NOT the factory default)
    Source: Cisco-Li_62:99:40 (00:22:6b:62:99:40)
        Address: Cisco-Li_62:99:40 (00:22:6b:62:99:40)
        .... ...0 .... .... .... .... = IG bit: Individual address (unicast)
        .... ..0. .... .... .... .... = LG bit: Globally unique address (factory default)
    Type: IPv6 (0x86dd)
Internet Protocol Version 6
    0110 .... = Version: 6
        [0110 .... = This field makes the filter "ip.version == 6" possible: 6]
    .... 0000 0000 .... .... .... .... .... = Traffic class: 0x00000000
    .... .... .... 0000 0000 0000 0000 0000 = Flowlabel: 0x00000000
    Payload length: 56
    Next header: ICMPv6 (0x3a)
    Hop limit: 255
    Source: fe80::222:6bff:fe62:9940 (fe80::222:6bff:fe62:9940)
    Destination: ff02::1 (ff02::1)
Internet Control Message Protocol v6
    Type: 134 (Router advertisement)
    Code: 0
    Checksum: 0x8226 [correct]
    Cur hop limit: 64
    Flags: 0x58
        0... .... = Not managed
        .1.. .... = Other
        ..0. .... = Not Home Agent
        ...1 1... = Router preference: Low
    Router lifetime: 1800
    Reachable time: 0
    Retrans timer: 0
    ICMPv6 Option (Prefix information)
        Type: Prefix information (3)
        Length: 32
        Prefix length: 64
        Flags: 0xc0
            1... .... = Onlink
            .1.. .... = Auto
            ..0. .... = Not router address
            ...0 .... = Not site prefix
        Valid lifetime: 30
        Preferred lifetime: 20
        Prefix: 2002:62eb:e012::
    ICMPv6 Option (Source link-layer address)
        Type: Source link-layer address (1)
        Length: 8
        Link-layer address: 00:22:6b:62:99:40

I'm seeing the issue on multiple computers and operating systems, all connected to the router. My systems are reacting appropriately to a IPv6 router advertisement by adding an IP address to their ethernet interfaces with the advertised prefix, unfortunately, it's one that doesn't work to reach normal IPv6 addresses.
On my unix based systems (linux, Mac OS X), I've been able to work around the issue by putting in a filter blocking icmp6 from the IPv6 link layer address of the linksys router, but I don't have that option on all my systems.

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%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0, changed state to down*Mar  2 11:09:51.945: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan1, changed state to down*Mar  2 11:09:51.945: ICMPv6-ND: L3 down on Vlan1*Mar  2 11:09:51.949: IPv6-Address: Address 2001:470:1F15:EE2:219:AAFF:FEC2:30BC/64 is down on Vlan1*Mar  2 11:09:51.949: ICMPv6-ND: Linklocal FE80::219:AAFF:FEC2:30BC on Vlan1, Down*Mar  2 11:09:51.949: IPv6-Address: Address FE80::219:AAFF:FEC2:30BC/10 is down on Vlan1*Mar  2 11:09:52.949: %LINK-3-UPDOWN: Interface FastEthernet0, changed state to down*Mar  2 11:09:54.497: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan1, changed state to up*Mar  2 11:09:54.501: ICMPv6-ND: L2 came up on Vlan1*Mar  2 11:09:54.501: IPv6-Addrmgr-ND: DAD request for FE80::219:AAFF:FEC2:30BC on Vlan1*Mar  2 11:09:54.501: ICMPv6-ND: Sending NS for FE80::219:AAFF:FEC2:30BC on Vlan1*Mar  2 11:09:54.505: ICMPv6: Sent N-Solicit, Src=::, Dst=FF02::1:FFC2:30BC*Mar  2 11:09:55.489: %LINK-3-UPDOWN: Interface FastEthernet0, changed state to up*Mar  2 11:09:55.501: IPv6-Addrmgr-ND: DAD: FE80::219:AAFF:FEC2:30BC is unique.*Mar  2 11:09:55.501: ICMPv6-ND: Sending NA for FE80::219:AAFF:FEC2:30BC on Vlan1*Mar  2 11:09:55.501: ICMPv6-ND: L3 came up on Vlan1*Mar  2 11:09:55.501: IPv6-Addrmgr-ND: DAD request for 2001:470:1F15:EE2:219:AAFF:FEC2:30BC on Vlan1*Mar  2 11:09:55.501: ICMPv6-ND: Sending NS for 2001:470:1F15:EE2:219:AAFF:FEC2:30BC on Vlan1*Mar  2 11:09:55.501: ICMPv6-ND: Linklocal FE80::219:AAFF:FEC2:30BC on Vlan1, Up*Mar  2 11:09:55.501: ICMPv6: Sent N-Advert, Src=FE80::219:AAFF:FEC2:30BC, Dst=FF02::1*Mar  2 11:09:55.501: ICMPv6: Sent N-Solicit, Src=::, Dst=FF02::1:FFC2:30BC*Mar  2 11:09:55.501: IPv6-Address: Address FE80::219:AAFF:FEC2:30BC/10 is up on Vlan1*Mar  2 11:09:56.490: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0, changed state to up*Mar  2 11:09:56.502: IPv6-Addrmgr-ND: DAD: 2001:470:1F15:EE2:219:AAFF:FEC2:30BC is unique.*Mar  2 11:09:56.502: ICMPv6-ND: Sending NA for 2001:470:1F15:EE2:219:AAFF:FEC2:30BC on Vlan1*Mar  2 11:09:56.502: IPv6-Address: Address 2001:470:1F15:EE2:219:AAFF:FEC2:30BC/64 is up on Vlan1*Mar  2 11:09:56.506: ICMPv6: Sent N-Advert, Src=2001:470:1F15:EE2:219:AAFF:FEC2:30BC, Dst=FF02::1*Mar  2 11:10:22.596: ICMPv6: Received R-Solicit, Src=FE80::7004:6BEB:4C26:79ED, Dst=FF02::2*Mar  2 11:10:22.596: ICMPv6-ND: Received RS on Vlan1 from FE80::7004:6BEB:4C26:79ED*Mar  2 11:10:22.596: ICMPv6-ND: Sending solicited RA on Vlan1*Mar  2 11:10:22.596: ICMPv6-ND: Sending RA from FE80::219:AAFF:FEC2:30BC to FE80::7004:6BEB:4C26:79ED on Vlan1*Mar  2 11:10:22.600: ICMPv6-ND:     MTU = 1500*Mar  2 11:10:22.600: ICMPv6-ND:     prefix = 2001:470:1F15:EE2::/64 onlink autoconfig*Mar  2 11:10:22.600: ICMPv6-ND:             2592000/604800 (valid/preferred)*Mar  2 11:10:22.600: ICMPv6: Received type 143, Src=FE80::7004:6BEB:4C26:79ED, Dst=FF02::16*Mar  2 11:10:22.604: ICMPv6-ND: STALE -> DELAY: FE80::7004:6BEB:4C26:79ED*Mar  2 11:10:22.604: ICMPv6: Sent R-Advert, Src=FE80::219:AAFF:FEC2:30BC, Dst=FE80::7004:6BEB:4C26:79ED*Mar  2 11:10:22.604: ICMPv6: Received type 143, Src=FE80::7004:6BEB:4C26:79ED, Dst=FF02::16*Mar  2 11:10:23.096: ICMPv6: Received type 143, Src=FE80::7004:6BEB:4C26:79ED, Dst=FF02::16*Mar  2 11:10:25.452: ICMPv6: Received type 143, Src=FE80::7004:6BEB:4C26:79ED, Dst=FF02::16*Mar  2 11:10:25.452: ICMPv6: Received type 143, Src=FE80::7004:6BEB:4C26:79ED, Dst=FF02::16*Mar  2 11:10:25.456: ICMPv6: Received type 143, Src=FE80::7004:6BEB:4C26:79ED, Dst=FF02::16*Mar  2 11:10:25.592: ICMPv6: Received type 143, Src=FE80::7004:6BEB:4C26:79ED, Dst=FF02::16*Mar  2 11:10:25.764: ICMPv6: Received type 143, Src=FE80::7004:6BEB:4C26:79ED, Dst=FF02::16*Mar  2 11:10:25.768: ICMPv6: Received type 143, Src=FE80::7004:6BEB:4C26:79ED, Dst=FF02::16*Mar  2 11:10:26.096: ICMPv6: Received type 143, Src=FE80::7004:6BEB:4C26:79ED, Dst=FF02::16*Mar  2 11:10:27.605: ICMPv6-ND: DELAY -> 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    So the result is that the Host obtains again the prefix through Autoconfiguration from RA router message.
    I haved looked for new cli commands on the router to prevent this but I haven't found any other. The more I had got is to configure the commands (specially the first one):
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    ipv6 nd managed-config-flag
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    and I don't want that because later I want to deploy a Windows Server in the same LAN to do that function (Dhcp server, DNS server...)
    That's what happens (Router sends again RA)
    FONTENLAS#show run interface vlan 1Building configuration...Current configuration : 253 bytes!interface Vlan1 ip address 172.16.1.1 255.255.255.0 ip nat inside ip virtual-reassembly ip tcp adjust-mss 1412 ipv6 address 2001:470:1F15:EE2::/64 eui-64 ipv6 nd prefix default no-advertise ipv6 nd managed-config-flag ipv6 nd ra suppressendFONTENLAS#*Mar  2 11:26:15.067: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0, changed state to down*Mar  2 11:26:15.067: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan1, changed state to down*Mar  2 11:26:15.067: ICMPv6-ND: L3 down on Vlan1*Mar  2 11:26:15.071: IPv6-Address: Address 2001:470:1F15:EE2:219:AAFF:FEC2:30BC/64 is down on Vlan1*Mar  2 11:26:15.071: ICMPv6-ND: Linklocal FE80::219:AAFF:FEC2:30BC on Vlan1, Down*Mar  2 11:26:15.071: IPv6-Address: Address FE80::219:AAFF:FEC2:30BC/10 is down on Vlan1*Mar  2 11:26:16.068: %LINK-3-UPDOWN: Interface FastEthernet0, changed state to down*Mar  2 11:26:17.700: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan1, changed state to up*Mar  2 11:26:17.704: ICMPv6-ND: L2 came up on Vlan1*Mar  2 11:26:17.704: IPv6-Addrmgr-ND: DAD request for FE80::219:AAFF:FEC2:30BC on Vlan1*Mar  2 11:26:17.704: ICMPv6-ND: Sending NS for FE80::219:AAFF:FEC2:30BC on Vlan1*Mar  2 11:26:17.708: ICMPv6: Sent N-Solicit, Src=::, Dst=FF02::1:FFC2:30BC*Mar  2 11:26:18.692: %LINK-3-UPDOWN: Interface FastEthernet0, changed state to up*Mar  2 11:26:18.704: IPv6-Addrmgr-ND: DAD: FE80::219:AAFF:FEC2:30BC is unique.*Mar  2 11:26:18.704: ICMPv6-ND: Sending NA for FE80::219:AAFF:FEC2:30BC on Vlan1*Mar  2 11:26:18.704: ICMPv6-ND: L3 came up on Vlan1*Mar  2 11:26:18.704: IPv6-Addrmgr-ND: DAD request for 2001:470:1F15:EE2:219:AAFF:FEC2:30BC on Vlan1*Mar  2 11:26:18.704: ICMPv6-ND: Sending NS for 2001:470:1F15:EE2:219:AAFF:FEC2:30BC on Vlan1*Mar  2 11:26:18.704: ICMPv6-ND: Linklocal FE80::219:AAFF:FEC2:30BC on Vlan1, Up*Mar  2 11:26:18.704: ICMPv6: Sent N-Advert, Src=FE80::219:AAFF:FEC2:30BC, Dst=FF02::1*Mar  2 11:26:18.704: ICMPv6: Sent N-Solicit, Src=::, Dst=FF02::1:FFC2:30BC*Mar  2 11:26:18.704: IPv6-Address: Address FE80::219:AAFF:FEC2:30BC/10 is up on Vlan1*Mar  2 11:26:19.692: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0, changed state to up*Mar  2 11:26:19.704: IPv6-Addrmgr-ND: DAD: 2001:470:1F15:EE2:219:AAFF:FEC2:30BC is unique.*Mar  2 11:26:19.704: ICMPv6-ND: Sending NA for 2001:470:1F15:EE2:219:AAFF:FEC2:30BC on Vlan1*Mar  2 11:26:19.704: IPv6-Address: Address 2001:470:1F15:EE2:219:AAFF:FEC2:30BC/64 is up on Vlan1*Mar  2 11:26:19.708: ICMPv6: Sent N-Advert, Src=2001:470:1F15:EE2:219:AAFF:FEC2:30BC, Dst=FF02::1*Mar  2 11:26:44.958: ICMPv6: Received R-Solicit, Src=FE80::7004:6BEB:4C26:79ED, Dst=FF02::2*Mar  2 11:26:44.958: ICMPv6-ND: Received RS on Vlan1 from FE80::7004:6BEB:4C26:79ED*Mar  2 11:26:44.958: ICMPv6-ND: Sending solicited RA on Vlan1*Mar  2 11:26:44.958: ICMPv6-ND: Sending RA from FE80::219:AAFF:FEC2:30BC to FE80::7004:6BEB:4C26:79ED on Vlan1*Mar  2 11:26:44.962: ICMPv6-ND:     Managed address configuration*Mar  2 11:26:44.962: ICMPv6-ND:     MTU = 1500*Mar  2 11:26:44.962: ICMPv6: Received type 143, Src=FE80::7004:6BEB:4C26:79ED, Dst=FF02::16*Mar  2 11:26:44.966: ICMPv6-ND: STALE -> DELAY: FE80::7004:6BEB:4C26:79ED*Mar  2 11:26:44.966: ICMPv6: Sent R-Advert, Src=FE80::219:AAFF:FEC2:30BC, Dst=FE80::7004:6BEB:4C26:79ED*Mar  2 11:26:45.458: ICMPv6: Received type 143, Src=FE80::7004:6BEB:4C26:79ED, Dst=FF02::16*Mar  2 11:26:47.879: ICMPv6: Received type 143, Src=FE80::7004:6BEB:4C26:79ED, Dst=FF02::16*Mar  2 11:26:47.879: ICMPv6: Received type 143, Src=FE80::7004:6BEB:4C26:79ED, Dst=FF02::16*Mar  2 11:26:47.883: ICMPv6: Received type 143, Src=FE80::7004:6BEB:4C26:79ED, Dst=FF02::16*Mar  2 11:26:47.955: ICMPv6: Received type 143, Src=FE80::7004:6BEB:4C26:79ED, Dst=FF02::16*Mar  2 11:26:48.187: ICMPv6: Received type 143, Src=FE80::7004:6BEB:4C26:79ED, Dst=FF02::16*Mar  2 11:26:48.191: ICMPv6: Received type 143, Src=FE80::7004:6BEB:4C26:79ED, Dst=FF02::16*Mar  2 11:26:48.459: ICMPv6: Received type 143, Src=FE80::7004:6BEB:4C26:79ED, Dst=FF02::16*Mar  2 11:26:49.967: ICMPv6-ND: DELAY -> PROBE: FE80::7004:6BEB:4C26:79ED*Mar  2 11:26:49.967: ICMPv6-ND: Sending NS for FE80::7004:6BEB:4C26:79ED on Vlan1*Mar  2 11:26:49.971: ICMPv6: Sent N-Solicit, Src=FE80::219:AAFF:FEC2:30BC, Dst=FE80::7004:6BEB:4C26:79ED*Mar  2 11:26:49.971: ICMPv6: Received N-Advert, Src=FE80::7004:6BEB:4C26:79ED, Dst=FE80::219:AAFF:FEC2:30BC*Mar  2 11:26:49.971: ICMPv6-ND: Received NA for FE80::7004:6BEB:4C26:79ED on Vlan1 from FE80::7004:6BEB:4C26:79ED*Mar  2 11:26:49.971: ICMPv6-ND: PROBE -> REACH: FE80::7004:6BEB:4C26:79ED*Mar  2 11:26:51.620: ICMPv6: Received N-Solicit, Src=FE80::7004:6BEB:4C26:79ED, Dst=FF02::1:FFC2:30BC*Mar  2 11:26:51.620: ICMPv6-ND: Received NS for FE80::219:AAFF:FEC2:30BC on Vlan1 from FE80::7004:6BEB:4C26:79ED*Mar  2 11:26:51.624: ICMPv6-ND: Sending NA for FE80::219:AAFF:FEC2:30BC on Vlan1*Mar  2 11:26:51.628: ICMPv6: Sent N-Advert, Src=FE80::219:AAFF:FEC2:30BC, Dst=FE80::7004:6BEB:4C26:79ED*Mar  2 11:27:02.606: ICMPv6: Received N-Solicit, Src=FE80::7004:6BEB:4C26:79ED, Dst=FF02::1:FFC2:30BC*Mar  2 11:27:02.606: ICMPv6-ND: Received NS for FE80::219:AAFF:FEC2:30BC on Vlan1 from FE80::7004:6BEB:4C26:79ED*Mar  2 11:27:02.606: ICMPv6-ND: Sending NA for FE80::219:AAFF:FEC2:30BC on Vlan1*Mar  2 11:27:02.610: ICMPv6: Sent N-Advert, Src=FE80::219:AAFF:FEC2:30BC, Dst=FE80::7004:6BEB:4C26:79ED*Mar  2 11:27:03.486: ICMPv6: Received type 143, Src=FE80::7004:6BEB:4C26:79ED, Dst=FF02::16*Mar  2 11:27:03.954: ICMPv6: Received type 143, Src=FE80::7004:6BEB:4C26:79ED, Dst=FF02::16*Mar  2 11:27:32.477: ICMPv6-ND: REACH -> STALE: FE80::7004:6BEB:4C26:79EDFONTENLAS#
    So I would like to know If I making some mistake or some missconfiguration with this?
    Maybe I haven't  the correct knowless about how Slacc Autoconfiguration should work (Isn't right that with suppress comand configured the router shouldn't send any RA message ?), or maybe it's a problem with this IOS version. I'm gettin crazy with this.
    This router has 24 Mb Flash, so If it's a problem with IOS version, I don't know which one to put on it because I think 15.X versions exceed 24Mb
    Thanks for reading this large post and for helping
    Kind regards
    Pablo JC

    Hi Harold:
      Thanks so much for your answer.
      Unfortunately, this Router has 128/24 Dram, but IOS 15.1(3)T3 requires 193/32.
    Related to your answer I have found this link
    Where it is explained:
    CSCth90147
    Symptoms: Router will respond to an RS with an RA.
    Conditions:  The symptom is observed when you configure the ipv6 nd ra suppress  command. This command is only intended to suppress periodic mcast RAs.  The router will still respond to unicast RS (that is intended behavior).
    Workaround: Use an ACL to block the reception of RS packets.
    I have read in another web that other possible solution is to use configuren the nd ra lifetime messages as 0.
    I have combined several commands in this way:
    interface Vlan1
    ip address 172.16.1.1 255.255.255.0
    ip nat inside
    ip virtual-reassembly
    ip tcp adjust-mss 1412
    ipv6 address 2001:470:1F15:EE2::/64 eui-64
    ipv6 nd prefix default no-advertise
    ipv6 nd managed-config-flag
    ipv6 nd ra suppress
    ipv6 nd ra lifetime 0
    end
    With:
    ipv6 nd ra suppress -> The router won't send periodical RA messages
    ipv6 nd prefix default no-advertise -> The router won't publish the prefix in message RA that it send answering host RS
    ipv6 nd ra lifetime 0 -> Does this prevent that the rest of the configuration send by RA could stay in hosts
    ipv6 nd managed-config-flag
    What do you thing about this configuration? I know  it's a bit dirtier than using an ACL to block the reception of RS  packet, but could it done the same function?
    Kind regards
    Thanks for reading

  • IPV6 Router Advertisement issue

    Just wondering if anyone else has ran into this. I have a number of Macs at home, but my primary machine is a new MBP Retina. I have a Juniper SRX 210 firewall that is configured as an IPV6 RA and IPV4 DHCP server. I have no issues getting both V4 and V6 addresses. However, with this particular machine, if it sleeps, it usually loses its V6 RA address. I have to go into Prefs, where I still see it most times mind you, and then select a manual address, apply, revert and apply and then it works just fine again. I have my older MBP (1.5 years old) that I cloned, and I don't seem to have the problem on it (or at least I never noticed it when I was using it a lot), but it was also not on Mav most of the time (only upgraded to Mav before I migrated it to the new MBP). This is all using wired ethernet as I work from my home office so it usually is sitting on my desk. Anyway, if anyone has any thoughts or suggestions on this one, I would appreciate it. Thanks.

    No, this is not currently supported, and the last I heard, there is no roadmap for this until it becomes a standard (as opposed to being experimental).

  • Reassigning IPv6 temporary address when it receives router advertisements

    Hi everybody.
    I've just met a problem with IPv6 connectivity.
    *My environment*
    I list my environment that I tested as follows.
    1. MacBook Pro (A)
    OS Version: 10.6.4
    Card Type: AirPort Extreme (0x14E4, 0x93)
    Firmware Version: Broadcom BCM43xx 1.0 (5.10.131.16.1)
    IPv6 temporary address setting: net.inet6.ip6.use_tempaddr=1
    2. AP+Router
    TimeCapsule
    N.B., I experienced same problem under other sets of router and access point (Cisco's ones). So, let me skip to write the detail of this.
    3. MacBook Pro (B) (No problem with this Laptop)
    OS Version: 10.6.4
    Card Type: AirPort Extreme (0x168C, 0x87)
    Firmware Version: Atheros 5416: 2.0.19.10
    IPv6 temporary address setting: net.inet6.ip6.use_tempaddr=1
    N.B., All user data and settings are transferred to MacBook Pro (A). I think the difference between these two MacBooks is about hardwares.
    *The problem*
    1. Connect the MacBook Pro (A) to AP+Router.
    2. Receive IPv6 router advertisement from the router. (router lifetime=1800, valid lifetime=2592000, preferred lifetime=604800)
    3. Assign both IPv6 EUI-64 address and temporary address.
    4. Receive IPv6 router advertisement from the router again, 70 sec after previous one.
    5. Both the EUI-64 and temporary addresses are removed, and then same EUI-64 address and _new_ temporary address are assigned.
    The problem here is that MacBook Pro (A) configures _new_ temporary address, or it removes old temporary address. This causes additional issues on TCP connections because TCP sessions become no longer available after the temporary address has changed.
    This problem is not experienced my old MacBook Pro (B); i.e., it keeps the temporary address even after receiving router advertisements.
    All the data and setting in MacBook Pro (A) are transferred from MacBook Pro (B).
    Therefore, I think the problem is due to hardwares.
    I prefer to use IPv6 because I'm in a networking group and also prefer to use temporary addresses.
    Do you experience same problem or any suggestions to me?
    If you need additional environment description, please ask me.
    Thank you in advance, and sorry for my poor English.
    Message was edited by: scyphus

    This bug has been stealthily fixed in the update http://support.apple.com/kb/HT4250 today, though I have received no reply from Apple bug reporter site.

  • Applications sending ipv6 dns queries, but ipv6 is disabled

    Hi,
    I had some problems with dns lookups a long time ago and so I followed every hint I could find here in the forums and the wiki, like disabling ipv6, installing dnsmasq, and so on. Firefox and other typical internet applications worked like a charm after that.
    Pacman instead took a long time to lookup the ip for the chosen mirror url, but I didn't bother to look deeper into this issue, until now.
    Wireshark revealed that the dns query that is sent by pacman (and some other console applications like w3m, wget, but not lynx ...) is an AAAA query for an ipv6 address. In spite of ipv6 being disabled.
    Additionally my router (which is added in /etc/resolv.conf) ignores the query, it times out, and after 5 seconds, the AAAA query is sent again.
    This happens 4 times and then a query for the A record is sent which is answered promptly.
    (A simple "w3m google.com" takes up to 1min 20sec with all the lookups following the 301 and 302 answers...)
    Well, a workaround for this is obvious. I could use a nameserver that answers the AAAA query, which I already tried with the opendns server.
    But the question that I have is: Why are some applications sending dns queries for ipv6 addresses although ipv6 is disabled?
    Regards,
    Marc

    Hi,
    I had some problems with dns lookups a long time ago and so I followed every hint I could find here in the forums and the wiki, like disabling ipv6, installing dnsmasq, and so on. Firefox and other typical internet applications worked like a charm after that.
    Pacman instead took a long time to lookup the ip for the chosen mirror url, but I didn't bother to look deeper into this issue, until now.
    Wireshark revealed that the dns query that is sent by pacman (and some other console applications like w3m, wget, but not lynx ...) is an AAAA query for an ipv6 address. In spite of ipv6 being disabled.
    Additionally my router (which is added in /etc/resolv.conf) ignores the query, it times out, and after 5 seconds, the AAAA query is sent again.
    This happens 4 times and then a query for the A record is sent which is answered promptly.
    (A simple "w3m google.com" takes up to 1min 20sec with all the lookups following the 301 and 302 answers...)
    Well, a workaround for this is obvious. I could use a nameserver that answers the AAAA query, which I already tried with the opendns server.
    But the question that I have is: Why are some applications sending dns queries for ipv6 addresses although ipv6 is disabled?
    Regards,
    Marc

  • Route advertisement with AS path

    Hello
    We are running Multi-homed network, to influence the BGP route selection, we are using AS path attribute with route-maps.
    Recently, we observed that the routes advertised on TCL network(ISP 1) were not reflected in global routing table.
    For example, we have advertised a network (196.X.X.X/24) on TCL BGP peer as best path and also advertised the same network on another BGP peer with AS path pretend of 10times. But, the network is reaching via Bharti BGP (iSP 2 )peer instead of TCL peer.
    Can anyone help understand as why it is preferred route is via Bharti 
    Thanks
    Viswa Sai

    Network statement in BGP configuration is used to identify which networks are being advertised. BGP process then checks the global routing table, if it sees a prefix in global routing table and with exact match (including subnet mask), only then it will advertise that network to other BGP peers. 
    Is this network a local network or learned from other routing protocols? If locak, make sure you enter exact mask of the network seen in routing table. If learned from other routing protocols, the better way is to selectively redistribute iGP routes into BGP using prefix-list and route-map.
    As far as convergence is concerned, below is explanation:
    BGP routers router will not start the BGP Best-Path calculation/selection process until they receives all NLRI from BGP peer. This will be known from UPDATE messages. End of UPDATE messages is usually identified after a KEEPALIVE message is received. 
    The time taken to learn new best path is directly proportional to number of NLRIs received from peers. 
    Only when your service provider router selects it's best path, and installs into RIB, it is going to send UPDATE message to your routers. If SP routers use line cards with Cisco distributed forwarding, it is going to populate it's FIB and then send UPDATE message.
    It depends on how fast your Bharati BGP peer detects your network unreachable and sends UPDATE messages to it's peers to withdraw your network's NLRI from it's routing table.
    There are ways to improve this convergence, but at service provider level. In your network, if you want faster re-convergence, static routes (with higher AD) would be a wonderful solution.
    Few other ways would be to use:
    Bidirectional forwarding detection (BFD)
    fast neighbor failover
    BGP next hop tracking
    BGP best external path (IOS and vendor specific)
    BGP prefix convergence (IOS and vendor specific)
    Peace and Health,
    Ravindra

  • Ipv6 routing ASA

    Hello, I trying to ping from one interface to other interfae , submask is 116.
    ASA# ping ipv6-test XXX:XXXX:1111:1:0:0:0:2
    Type escape sequence to abort.
    Sending 5, 100-byte ICMP Echos to XXXX:XXXX:1111:1::2, timeout is 2 seconds:
    No route to host XXXX:XXX:1111:1::2
      Success rate is 0 percent (0/1)
    ASA# ping ipv6 XXXX:XXXX:1111:1:0:0:0:1001
    Type escape sequence to abort.
    Sending 5, 100-byte ICMP Echos to XXXX:XXXX:1111:1::1001, timeout is 2 seconds:
    No route to host XXXX:XXXX:1111:1::1001
    Success rate is 0 percent (0/1)
    This are my interfaces:
    interface GigabitEthernet1/1.18
    vlan 18
    nameif ipv6-test
    security-level 2
    ip address 10.175.25.1 255.255.255.0
    ipv6 address  XXXX:XXXX:1111:1::1001/116
    ipv6 address autoconfig
    ipv6 enable
    ipv6 nd suppress-ra
    interface GigabitEthernet1/2
    speed 100
    duplex full
    nameif Ipv6
    security-level 1
    ip address 10.176.25.1 255.255.255.0
    ipv6 address XXX:XXXX:1111:1::2/116
    ipv6 enable
    ipv6 nd suppress-ra
    And this is my IPv6 route table ...
    ASA# show ipv6 route
    IPv6 Routing Table - 7 entries
    Codes: C - Connected, L - Local, S - Static
    L   XXXX:XXXX:1111:1::2/128 [0/0]
         via ::, Ipv6
    C   XXXX:XXXX:1111:1::/116 [0/0]
         via ::, Ipv6
    L   XXXX:XXXX:1111:1::1001/128 [0/0]
         via ::, ipv6-test
    C   XXX:XXX:1111:1::1000/116 [0/0]
         via ::, ipv6-test
    L   fe80::/10 [0/0]
         via ::, Ipv6
         via ::, ipv6-test
    L   ff00::/8 [0/0]
         via ::, Ipv6
         via ::, ipv6-test
    S   ::/0 [0/0]
         via XXXX:XXXX:1111:1::1, Ipv6
    ACls a set to any any ip.
    Any idea, why i can ping between my interfaces?
    Thanks

    I still have the same problem, but I don´t have the problem between machines, only between ASA interfaces, I think it is a "feature" or something like this, if it isn´t a feature I don´t understant it.
    Thanks

  • Can you display routes advertised and/or received in OSPF, similar to BGP command sh ip bgp neighbors x.x.x.x advertised-routes?

    TOC-BP-SWa#sh ip bgp neighbors 10.14.0.3 advertised-routes
    BGP table version is 1674320, local router ID is 10.14.0.1
    Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
                  S Stale
    Origin codes: i - IGP, e - EGP, ? - incomplete
       Network          Next Hop            Metric LocPrf Weight Path
    *> 10.14.0.1/32     0.0.0.0                  0         32768 i
    *> 147.249.37.0/24  172.20.18.1                   120      0 2001 65015 65016 64823 7381 64681 i
    *> 147.249.38.0/24  172.20.18.1                   120      0 2001 65015 65016 64823 7381 64681 i
    *> 147.249.46.0/24  172.20.18.1                   120      0 2001 65015 65016 64823 7381 12159 12159 i
    *> 147.249.196.0/24 172.20.18.1                   120      0 2001 65015 65016 64823 64870 65124 i
    *> 147.249.237.0/24 172.20.18.1                   120      0 2001 65015 65016 64823 7381 64681 i
    TOC-BP-SWa#sh ip bgp neighbors 10.14.0.3 received-r       
    Total number of prefixes 0 
    TOC-BP-SWa#sh ip bgp neighbors 10.14.0.2 received-r
    BGP table version is 1674320, local router ID is 10.14.0.1
    Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
                  S Stale
    Origin codes: i - IGP, e - EGP, ? - incomplete
       Network          Next Hop            Metric LocPrf Weight Path
    *>i10.14.0.2/32     10.14.0.2                0    100      0 i
    * i147.249.37.0/24  10.14.0.2                0    120      0 2001 65015 65016 64823 7381 64681 i
    * i147.249.38.0/24  10.14.0.2                0    120      0 2001 65015 65016 64823 7381 64681 i
    * i147.249.46.0/24  10.14.0.2                0    120      0 2001 65015 65016 64823 7381 12159 12159 i
    * i147.249.196.0/24 10.14.0.2                0    120      0 2001 65015 65016 64823 64870 65124 i
    * i147.249.237.0/24 10.14.0.2                0    120      0 2001 65015 65016 64823 7381 64681 i
    Can this output be duplicated with an OSPF command? 

    Not really because OSPF does not advertise routes it sends LSAs to it's peers.
    So you need to look at the OSPF database ie. -
    "sh ip ospf database"
    which will show you all the LSAs the router is aware of.
    In terms of all the LSAs the router has received it will show all of those but it will also show you LSAs that were generated by the router itself although the advertising router IP will point to that being the case.
    In terms of all the LSAs the router advertises again it depends on the area and how that has been configured.
    So for example an ABR might well have external LSAs (which aren't tied to any area in the OSPF database) but that doesn't necessarily mean it is advertising them to peers within an area as it could have been configured not to.
    So it gives you a good idea but you need to also work out a few things for yourself as well.
    Jon

  • Ipv6 route preference

    Hello all, I have DA server in my network. isatap NIC is advertising ipv6 routes (include default route) for all my computers. Also I have ipv6 router, which provide access to Internet. If I look to route table on client computer, I see two IPv6 default
    route with same metric. Because my DA server do not provide access to internet, I'm losing half outbound IPv6 packet to Internet (if you have two routes with same metric, your computer will use round robin for outbound packets).
    Can I set preferences parameter for default route advertise on DA server?
    PS If I disable advertise default route on isatap, I'll get to error in remote access management console.

    It's tricky given that BGP's AD is always going to beat out EIGRP's all other things being equal. Most of the things you can do with BGP route-maps involve making one BGP route preferred over another.
    You could inject the preferred path as a static route (AD = 1) to the firewall using an ip sla operation and having the static route track that. Once the ip sla operation fails, the static route is withdrawn and then the BGP-learned route (AD = 20) will take precedence.

  • Native Ipv6 Routing

    Hi All,
    I'm one of the few people who have a native IPv6 on his router but i would like to use it on all my devices on the network.
    To start with I will write a small topology of my network:
    (IPv4 and IPv6 Connected) -- Fritzbox 7340 - (10.0.1.1) ----- (10.0.1.2) (Airport Extreme 2007) (10.0.0.1) ----- (10.0.0.x range for home network)
    When i connect my Mac directly to my Fritzbox i will get a IPv6 adres and am on the IPv6 as well as IPv4 internet
    But i would like to connect to my airport instaid of directly on my router.
    What u tried was : Advanced -> IPv6 -> Mode = Host and Configure ipv6 = Automatic, which was a no joy.
    No mac is receiving a ipv6 adres and am not able to see which ipv6 is configured for my airport.
    Then i tried Advanced -> IPv6 -> Mode = Host and Configure ipv6 = Manual,
    Wan IP = 2001:My:Range::10 (which i made up)
    IPV6 Default Route = 2001:My:Range::1 (which is the same as my router but is on "the other side")
    Wan ipv6 prefix length = 48 ( because my range is 2001:My:Range::/48)
    What am i doing wrong?

    I was hoping to get some anwsers before I go buy a switch.
    When you write page 183, I assume you're referring to page 173:
    What's confusing is that for ipv4, the document has seperate sections for configuring ipv4 in layer 2 and layer 3 modes. Also, the doc clearly states this routing between vlan is supported in layer 3 mode:
    Operating in Layer 3 mode, the switch routes traffic between the directly attached
    IP subnets configured at the switch. The switch continues to bridge traffic
    between devices in the same VLAN. Additional IPv4 routes for routing to non-
    directly attached subnets can be configured in the IP Static Routing Page.
    But for ipv6, there's only one section for layer and layer 3, and then there's this:
    • IPv6 Address—The switch supports one IPv6 interface. In additional to the
    default link local and multicast addresses, the device also automatically
    adds global addresses to the interface based on the router advertisements
    it receives. The device supports a maximum of 128 addresses at the
    interface. Each address must be a valid IPv6 address that is specified in
    hexadecimal format by using 16-bit values separated by colons.
    Also,t here's no explicting mention of routing between the vlans for ipv6.

  • Why do not Apple send a fix for all fail´s / slow mac`s afther upgrade to Yosemite

    I have upgrade 2 of my Macbook air 11" models. Both have major slow functionality in allmost every programs. slow mail, safari, pages. Allmost nothing of the funksjonalitys can being uses in numbers. Slow functionality when jumping between programs. Allover i have BIG problems with mac for my first time. And why do not Apple send a fix for all fails there is after upgrading to Yosemite. When thousand of users have the same problem with major slow mac`s.
    Here is a test for my mac.
    EtreCheck version: 2.1 (101)
    Report generated 4. desember 2014 kl. 22.48.33 CET
    Hardware Information: ℹ️
      MacBook Air (Verified)
      MacBook Air - model: MacBookAir6,1
      1 1.7 GHz Intel Core i7 CPU: 2-core
      8 GB RAM Not upgradeable
      BANK 0/DIMM0
      4 GB DDR3 1600 MHz ok
      BANK 1/DIMM0
      4 GB DDR3 1600 MHz ok
      Bluetooth: Good - Handoff/Airdrop2 supported
      Wireless:  en0: 802.11 a/b/g/n/ac
    Video Information: ℹ️
      Intel HD Graphics 5000 -
      Color LCD 1366 x 768
    System Software: ℹ️
      OS X 10.10.1 (14B25) - Uptime: 0:12:8
    Disk Information: ℹ️
      APPLE SSD SM0512F disk0 : (500,28 GB)
      S.M.A.R.T. Status: Verified
      EFI (disk0s1) <not mounted> : 210 MB
      Recovery HD (disk0s3) <not mounted>  [Recovery]: 650 MB
      Macintosh HD (disk1) / : 496.30 GB (371.41 GB free)
      Core Storage: disk0s2 499.42 GB Online
    USB Information: ℹ️
      Apple Inc. BRCM20702 Hub
      Apple Inc. Bluetooth USB Host Controller
    Thunderbolt Information: ℹ️
      Apple Inc. thunderbolt_bus
    Gatekeeper: ℹ️
      Mac App Store
    Kernel Extensions: ℹ️
      /Applications/Parallels Access.app
      [not loaded]  com.parallels.virtualsound (1.0 18 - SDK 10.6) [Support]
      /Applications/Parallels Desktop.app
      [not loaded]  com.parallels.kext.hypervisor (10.1.1 28614 - SDK 10.7) [Support]
      [not loaded]  com.parallels.kext.netbridge (10.1.1 28614 - SDK 10.7) [Support]
      [not loaded]  com.parallels.kext.usbconnect (10.1.1 28614 - SDK 10.7) [Support]
      [not loaded]  com.parallels.kext.vnic (10.1.1 28614 - SDK 10.7) [Support]
      /Library/Application Support/Kaspersky Lab/KAV/Bases
      [not loaded]  com.kaspersky.kext.kimul.38 (38) [Support]
      /Library/Extensions
      [loaded]  com.silex.driver.sxuptp (1.10.9 - SDK 10.8) [Support]
      /System/Library/Extensions
      [not loaded]  com.devguru.driver.SamsungComposite (1.2.61 - SDK 10.6) [Support]
      [not loaded]  com.freecom.driver.BoulderScsi (1.0.0d1) [Support]
      [not loaded]  com.kaspersky.kext.klif (2.2.1d19) [Support]
      [not loaded]  com.zg.driver.ZGUSBCDCACMData (1.5) [Support]
      [not loaded]  com.zg.driver.ZGUSBMassStorageFilter (1.5) [Support]
      [not loaded]  com.zg.driver.cdc_ecm_qmi (1.9) [Support]
      [not loaded]  com.zg.driver.cdc_usb_bus (1.9) [Support]
      /System/Library/Extensions/ssuddrv.kext/Contents/PlugIns
      [not loaded]  com.devguru.driver.SamsungACMControl (1.2.61 - SDK 10.6) [Support]
      [not loaded]  com.devguru.driver.SamsungACMData (1.2.61 - SDK 10.6) [Support]
      [not loaded]  com.devguru.driver.SamsungMTP (1.2.61 - SDK 10.5) [Support]
      [not loaded]  com.devguru.driver.SamsungSerial (1.2.61 - SDK 10.6) [Support]
    Launch Agents: ℹ️
      [running]  com.brother.LOGINserver.plist [Support]
      [loaded]  com.google.keystone.agent.plist [Support]
      [loaded]  com.oracle.java.Java-Updater.plist [Support]
      [running]  com.parallels.mobile.prl_deskctl_agent.launchagent.plist [Support]
    Launch Daemons: ℹ️
      [loaded]  com.adobe.fpsaud.plist [Support]
      [loaded]  com.google.keystone.daemon.plist [Support]
      [failed]  com.kaspersky.kav.plist [Support] [Details]
      [loaded]  com.macpaw.CleanMyMac2.Agent.plist [Support]
      [loaded]  com.oracle.java.Helper-Tool.plist [Support]
      [loaded]  com.oracle.java.JavaUpdateHelper.plist [Support]
      [running]  com.parallels.mobile.dispatcher.launchdaemon.plist [Support]
      [failed]  com.parallels.mobile.kextloader.launchdaemon.plist [Support] [Details]
    User Launch Agents: ℹ️
      [running]  ca.indev.MailTagsHelper.agent.plist [Support]
      [loaded]  com.facebook.videochat.[redacted].plist [Support]
      [loaded]  com.genieo.completer.download.plist Adware! [Remove]
      [loaded]  com.genieo.completer.ltvbit.plist [Support]
      [running]  com.genieo.completer.update.plist Adware! [Remove]
      [not loaded]  com.macpaw.CleanMyMac.helperTool.plist [Support]
      [not loaded]  com.macpaw.CleanMyMac.trashSizeWatcher.plist [Support]
      [not loaded]  com.macpaw.CleanMyMac.volumeWatcher.plist [Support]
      [loaded]  com.macpaw.CleanMyMac2Helper.diskSpaceWatcher.plist [Support]
      [loaded]  com.macpaw.CleanMyMac2Helper.scheduledScan.plist [Support]
      [loaded]  com.macpaw.CleanMyMac2Helper.trashWatcher.plist [Support]
      [loaded]  com.parallels.mobile.startgui.launchagent.plist [Support]
    User Login Items: ℹ️
      iTunesHelper  ProgramHidden (/Applications/iTunes.app/Contents/MacOS/iTunesHelper.app)
      fuspredownloader  ProgramHidden (/Users/[redacted]/Library/Application Support/.FUS/fuspredownloader.app)
    Internet Plug-ins: ℹ️
      JavaAppletPlugin: Version: Java 7 Update 71 Check version
      FlashPlayer-10.6: Version: 15.0.0.239 - SDK 10.6 [Support]
      Default Browser: Version: 600 - SDK 10.10
      NP_2020Player_IKEA: Version: 5.0.94.1 - SDK 10.6 [Support]
      Flash Player: Version: 15.0.0.239 - SDK 10.6 [Support]
      QuickTime Plugin: Version: 7.7.3
      nplastpass: Version: 3.1.61 [Support]
      JavaPlugin2_NPAPI: Version: Unknown
      Silverlight: Version: 5.1.30514.0 - SDK 10.6 [Support]
      iPhotoPhotocast: Version: 7.0
    userinternetplugins ℹ️
      Google Earth Web Plug-in: Version: 7.1 [Support]
    Safari Extensions: ℹ️
      Facebook Cleaner
      Pin It Button
      LastPass
      ResizeMe
      OpenIE
    3rd Party Preference Panes: ℹ️
      Cineform  [Support]
      Flash Player  [Support]
      Java  [Support]
    Time Machine: ℹ️
      Mobile backups: ON
      Auto backup: YES
      Volumes being backed up:
      Macintosh HD: Disk size: 496.30 GB Disk used: 124.90 GB
      Destinations:
      Data [Network]
      Total size: 3.00 TB
      Total number of backups: 65
      Oldest backup: 2013-08-15 20:20:51 +0000
      Last backup: 2014-12-04 17:20:31 +0000
      Size of backup disk: Excellent
      Backup size 3.00 TB > (Disk size 496.30 GB X 3)
    Top Processes by CPU: ℹ️
           4%  WindowServer
           1%  fontd
           1%  cloudd
           0%  Safari
           0%  launchd
    Top Processes by Memory: ℹ️
      369 MB  com.apple.WebKit.WebContent
      155 MB  Safari
      103 MB  Feedback Assistant
      86 MB  Finder
      69 MB  mds_stores
    Virtual Memory Information: ℹ️
      4.52 GB  Free RAM
      2.60 GB  Active RAM
      652 MB  Inactive RAM
      820 MB  Wired RAM
      1.04 GB  Page-ins
      0 B  Page-outs
    Diagnostics Information: ℹ️
      Dec 4, 2014, 10:37:00 PM  Self test - passed

    [loaded]  com.genieo.completer.download.plist Adware! [Remove]
      [loaded]  com.genieo.completer.ltvbit.plist [Support]
      [running]  com.genieo.completer.update.plist Adware! [Remove]
      [not loaded]  com.macpaw.CleanMyMac.helperTool.plist [Support]
      [not loaded]  com.macpaw.CleanMyMac.trashSizeWatcher.plist [Support]
      [not loaded]  com.macpaw.CleanMyMac.volumeWatcher.plist [Support]
      [loaded]  com.macpaw.CleanMyMac2Helper.diskSpaceWatcher.plist [Support]
      [loaded]  com.macpaw.CleanMyMac2Helper.scheduledScan.plist [Support]
      [loaded]  com.macpaw.CleanMyMac2Helper.trashWatcher.plist [Support]
    Your machine is slow because you loaded a bunch of third party junk on it.

  • Why can't I send email from my iPad Air

    Why can't I send email from my iPad Air? I can receive them but not send.
    Thanks

    Hi..
    Try the troubleshooting steps here >  iOS: Troubleshooting Mail

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