Hi,
In IOS, OSPF would be enabled on the interfaces whose IP addresses matched the network command, but in XR we configure OSPF differently. Entering the interface name under the area command would enable OSPF on the interface (OSPF routing will occur only when an IP address is configured on the interface).
Looking at your configuration, I believe that OSPF should be enabled for the 3 Tengig interfaces. Take a look at "show ospf interface" to confirm this.
Also, here is more information on configuring OSPF in XR,
http://www.cisco.com/en/US/docs/routers/crs/software/crs_r4.2/routing/configuration/guide/b_routing_cg42crs_chapter_0100.html#task_1171983
Thanks and regards,
Rahul.

Similar Messages

How can I implement a backup 6500 that broadcasts the same OSPF networks?

I feel as though the answer for this is extremely simple, but my routing experience is very minimal. We have a 6500 switch that shares about 10 OSPF networks, which is behind out 7200 router; and we have a spare 6500 we would like to put into place at our second location as a failover. Can I add the same OSPF networks to this second 6500, or will this cause issues since two switches will be broadcasting the same network.
In the case that our core 6500 goes down, i would need the other 6500 to continue broadcasting these networks.

Disclaimer
The Author of this posting offers the information contained within this posting without consideration and with the reader's understanding that there's no implied or expressed suitability or fitness for any purpose. Information provided is for informational purposes only and should not be construed as rendering professional advice of any kind. Usage of this posting's information is solely at reader's own risk.
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In no event shall Author be liable for any damages whatsoever (including, without limitation, damages for loss of use, data or profit) arising out of the use or inability to use the posting's information even if Author has been advised of the possibility of such damage.
Posting
Yes, it's possible for two locations to advertize the same networks, but this implies that both locations can (normally) reach all the hosts on those networks (at either location). Also, if there's some kind of failure, some hosts (like one location's hosts) often can no longer be reached. That's normally ok, but what's normally not okay is for hosts on the same network to be partitioned.
Also, when you start to have networks across locations, sometimes there's requirements for hosts to logically migrate to the site that still is advertizing the host's network.
It can all get rather complicated depending on what exactly you're trying to accomplish.

Import EIGRP default route only with network command

Hi,
Does anyone know why I can only import the default route learned by EIGRP (from a CE router) in the VPNV4 table with the command ?network 0.0.0.0? under the address family? Is this the correct behavior?
router bgp 100
address-family ipv4 vrf red
redistribute eigrp 200
no synchronization
network 0.0.0.0
exit-address-family
PE9(config-router-af)#do show ip route vrf red 0.0.0.0
Routing entry for 0.0.0.0/0, supernet
Known via "eigrp 200", distance 90, metric 547840, candidate default path, type internal
Redistributing via bgp 100, eigrp 200
Last update from 91.91.91.1 on FastEthernet0/0.91, 00:04:11 ago
Routing Descriptor Blocks:
* 91.91.91.1, from 91.91.91.1, 00:04:11 ago, via FastEthernet0/0.91
Route metric is 547840, traffic share count is 1
Total delay is 20400 microseconds, minimum bandwidth is 100000 Kbit
Reliability 255/255, minimum MTU 1500 bytes
Loading 1/255, Hops 4
PE9(config-router-af)#do show ip bgp vpnv4 vrf red 0.0.0.0
% Network not in table
PE9(config-router-af)#
PE9(config-router-af)#network 0.0.0.0
PE9(config-router-af)#
PE9(config-router-af)#do show ip bgp vpnv4 vrf red 0.0.0.0
BGP routing table entry for 91:91:0.0.0.0/0, version 1068
Paths: (1 available, best #1, table red)
Flag: 0x820
Advertised to update-groups:
2
Local
91.91.91.1 (via red) from 0.0.0.0 (9.9.9.9)
Origin IGP, metric 547840, localpref 100, weight 32768, valid, sourced, local, best
Extended Community: RT:118:118 Cost:pre-bestpath:128:547840
0x8800:32768:0 0x8801:200:522240 0x8802:65284:25600 0x8803:65281:1500
mpls labels in/out 28/nolabel
PE9(config-router-af)#
Thanks,
Marcelo

Hi Marcelo,
Yes this is normal, a default route unlike any other routes is not redistributed between routing protocols by default, in the case of BGP you have 2 options, either use a network command and make sure that the route is in the routing table (via EIGRP in your case), or use redistribute + default-information originate, you can test this by removing the network command and adding the default-information originate under the address family.
HTH,
Mohammed Mahmoud.

CSCsm71553 - BGP advertises prefix after network command is removed

Hello,
I got a stack of core switches with the following components :
Switch Ports Model              SW Version            SW Image
     1 52    WS-C3750G-48PS     12.2(52)SE            C3750-IPSERVICES-M
*    2 52    WS-C3750V2-48PS    12.2(52)SE            C3750-IPSERVICESK9-M
BGP is configured on the stack in order to exchange routes with our WAN operator.
I've been told that with some versions of these IOS, BGP keeps on advertising prefix after network command is removed.
Can you tell me more about it and tell me if my software versions are submitted or not to this bug.
Thanking you;
Best regards;
Pascal

Hi Amit
Thanks a lot for your feedback.
To be noted : I also received an answer from a Cisco engineer writing me the bug was resolved since the 12.2(46)SE version. I will take no risk and prefer taking your answer into account.
Best regards.
Pascal

#sh ip ospf route Command

Hi All,
Kinldy let me know that #sh ip ospf route, which IOS Version support this command...
Regards
Indrapal

Hi Indrapal,
as far as I remember, 'show ip ospf route' is the unsupported version of the 'show ip ospf rib' command, which was introduced with the (Link:) OSPFv2 Local RIB feature in 12.4(15)T.
Perhaps somebody could confirm.
HTH
Rolf

VLANs in OSPF network?

Scope of Inquiry:
I've supported heterogeneous networks for merely a decade, but never quite big enough to expose me to Enterprise routing/switching concepts in real-time. I've supported numerous Metro Ethernet hub and spoke topologies, as well as a few racks in a datacenter environment ... however, once again ... no real application of OSPF, EIGRP, etc.
I'm learning some of the fundamental concepts of OSPF, adjacency, LSA types, etc... but one thing that has me tripped up is whether or not/how VLANs would be leveraged in a real-world scenario, in an OSPF environment.
Can anyone kindly give me a very clear and concise explanation/high-level explanation of the contextual application of VLANs in an OSPF network, including whether or not tags would exist in each area, etc. * Please do not pontificate --- that is to overstate a simple explanation with extraneous details that are outside the scope of a basic/real-world explanation. Hope that wasn't too terse, but I'm trying to gain a working knowledge of the protocol and its nuances quickly.
Thanks!
-Data-

Hi, I am afraid you chose the wrong forum. This one is mostly about contact centers. You might have to send your question to Routing&Switching section.
G.

[SOLVED] QEMU networking command line

Hello,
my virtual machine does not have any network devices, when I explicitly give a netdev user,id=... (which is the default, when I remember correctly). This is the commandline which I tried:
qemu-system-x86_64 -enable-kvm -smp 2 -m 384 -netdev user,id=guestnet,restrict=off,net=192.168.1.0/24,dhcpstart=192.168.1.5,hostfwd=tcp::12345-:22 server
But lspci and ip link don't show any devices. This commandline has exactly the same effect (and this should be the default, when no option is given):
qemu-system-x86_64 -enable-kvm -smp 2 -m 384 -netdev user,id=guestnet server
My guest only finds a network device when there are no netdev user,id=... arguments.
What is wrong with the command lines above?
Thanks for your help.
Last edited by Rachus (2013-06-02 10:45:07)

65kid wrote:
add
-net nic
Well, then I have a device, but the dhcp server of qemu does not work anymore.
neilzium wrote:IIRC each -netdev argument needs a corresponding -device argument. Here's an example.. This seems to be the newer, preffered method compared to -net and is used by libvirt. There may be no difference for user mode networking though.
Thanks, works perfectly. Sometimes it is hard to find something in the documentation.

Inactive Network command

I've searched the forums and found similar questions to this one, but none that solved my problem, so I apologize if this has been asked and answered already...
My home network consists of a cable modem wired into a Lynksys router. One port of the router connects to an AirPort Express and another port connects to the ethernet port on a TiPowerBook. There is also a G4 iBook with an internal AirPort card. Both computers are running OS 10.4.3
The PowerBook sees the iBook on the network without any problems. The iBook, on the other hand, can only connect to the PowerBook through the "Connect to Server" command within the GO menu of the Finder and typing in the address of the PowerBook or by navigating through the Network icon on the side bar of a Finder window. Choosing "Go -> Network" from the finder produces no action and choosing "Browse" from within the "Connect to Server" window opens a new finder window with "Macintosh HD" and "Network" at the top level but clicking on Network does nothing (there is also no "Open" command when ctrl-clicking on Network).
Is there a way to fix this inconvenience?

Upon further searching, I found this relevant Apple article:
http://docs.info.apple.com/article.html?artnum=302447
It indicates that the problem is related to user accounts that are set to log in automatically.

BGP and auto-summary enabled or disabled with "network" command

http://www.cisco.com/en/US/tech/tk365/technologies_q_and_a_item09186a00800949e8.shtml#five
I just modified the below quoted by adding numbers
My understanding is this:
A- I hope my numbering to the quoted above is right ,,,I numbered it to be easy to point to it.
B- What does it mean by locally originated, does it mean within AS ?
1- auto-summary is enabled it summarizes the locally originated BGP networks to their classfull boundaries without caring to check if there are any entry in IGP routing table,,,,Am I right ?
2- auto-summary is disabled, the routes introduced locally into the BGP table are not summarized to their classfull boundaries, without caring to check if there are any entry in IGP routing table,,,,Am I right ?
3- I could not match his example with his explanation
4- It is obvious.

Thanks hritter
I think you forgot to answer this :
1- Does that mean with "no auto-summary" we do not care about the exact match
The author says:
"3- When a subnet exists in the routing table and the following three conditions are satisfied, then any subnet of that classfull network in the local routing table will prompt BGP to install the classfull network into the BGP table.
* Classfull network statement for a network in the routing table
* Classfull mask on that network statement
* Auto-summary enabled "
Correct my understanding to the above quoted
The author says: For example, if the subnet in the routing table is 75.75.75.0 mask 255.255.255.0 {match the above quoted : When a subnet exists in the routing table}.
The author says : and you configure network 75.0.0.0 under the router bgp command (for my understanding it does not match the above quoted first comdition : Classfull network statement for a network in the routing table},,,,,,,he says 75.0.0.0 under bgp table and the above quoted says under routing table (IGP table)

Company merger - bgp/ospf networks

Hello Community!
My company recently merged with a small service provider that runs BGP/OSPF within their AS. We run the same protocols internally as well. I'm looking for some direction in merging the two networks. As of now, we have to keep our IP assignments separate and treat each network as it's own entity. I would like to eventually merge the two networks so we have one AS. I'm hoping someone in the community has experience with this type of change and would be able to provide some help/direction. I'm sure redistribution will be used, but i don't know how to start or where??? Any basic guidelines to follow or config examples would be greatly appreciated.
Thank you

Disclaimer
The Author of this posting offers the information contained within this posting without consideration and with the reader's understanding that there's no implied or expressed suitability or fitness for any purpose. Information provided is for informational purposes only and should not be construed as rendering professional advice of any kind. Usage of this posting's information is solely at reader's own risk.
Liability Disclaimer
In no event shall Author be liable for any damages whatsoever (including, without limitation, damages for loss of use, data or profit) arising out of the use or inability to use the posting's information even if Author has been advised of the possibility of such damage.
Posting
Dealt with a company merger several years ago. Found VRF and double NAT useful tools. VRF allowed insertion of company's network onto acquired company's network infrastructure while still keeping them isolated. Double NAT allow communication between overlapping IP addresses during transition.

RIP V2, network command with classless address yield to classful

As we know that RIP V2 is Classless while V1 is Classful.
Obviously there are other differences. Cisco has mentioned them in CCNA3 V3.1 Article 1.2.3
RIP V2 supports prefix routing with VLSM so different subnets within the same network can have different subnet masks.
A(config)#router rip
A(config-router)#ver 2
A(config-router)#network
A(config-router)#network 172.16.2.0
A(config-router)#^Z
A#sh run
*Apr 7 05:36:29.422: %SYS-5-CONFIG_I: Configured from console by console
A#sh run | b router rip
router rip
version 2
redistribute eigrp 12 metric 2
network 11.0.0.0
network 172.16.0.0
network 192.1.14.0
Why has the value been changed from 172.16.2.0 to 172.16.0.0 ?
What is the point of using RIP V2 if it yields to same result as RIP V1 ?

Although ripv2 is classless, the configuration of which interfaces are attached to the rip process is classfull.
In this case of yours, all interfaces configured in the range of 11.0.0.0/8, 172.16.0.0/16 or 192.1.14.0/24 will be attached to the rip process. If an interface exists with subnet 172.16.2.0/24 it will be advertised as such.
Hope this helps,

Getting error : Network : Command : ModuleInfo

Can anyone help me out. I am getting this over and over again when streaming to ustream . I do not get it when I am sending video over to Justin.tv . I have tried everything I can think of to correct this and no luck . I am using a Dazzle capture card to send the video out. After a hour or so my stream gets a huge delay ( about 2 min behind)

Module info message is sent by the server. Check out with ustream about the server-side action script which sends this message. However, this is just a messages and won't affect the stream quality.
About your 2nd problem of delay: Are you capturing audio also or it's just the video? And, does the delay disappear on reloading the flash player?
Please attach your session logs also.

6500 FWSM ipv6 ospf routing equal network cmd

Hi
As I understand there is no "network" cmd in cisco 6500 ipv6 OSPF config, we need to use "ipv6 ospf procid# area #" under interface. I need to config 6500 FWSM to work on OSPF, can anyone help to point out how to configure FWSM ipv6 OSPF? and what are the equal cmds to config OSPF network?
Thanks in advance.
gy

Your configurations are not making much sense.
You have the same vlan interfaces with the same IP addresses on all devices and multiple static routes for 192.168.1.0/24.
This is what you should change -
1) the clients only connect to MSHQ3 so remove all vlan interfaces off all the other switches for the client vlans.
Also remove the server vlan interface off MSHQ3
2) the server vlan only connects to MSHQ4 so remove the server vlan off all other switches and remove all the client vlan interfaces off MSHQ4
3) interconnect all your switches with L3 links because you are routing vlans locally on MSHQ3 and MSHQ4 so there is no need for any L2 links between switches.
Note also in a true routed design MSHQ3 should not connect to MSHQ4 ie. traffic between those devices goes via MSHQ1 and MSHQ2
4) remove all static routes for 192.168.1.0/24 from all devices
5) run OSPF on all devices and only advertise the locally connected subnets off each device.
For the switch interconnects use new IP subnets, don't reuse any of your existing vlan subnets.
If you do all of the above then you have a routed access design with your distribution switches, MSHQ1 and MSHQ2 routing between access layer switches and the router.
If you are trying to achieve something else other than a routed access layer design then please come back and clarify.
But either way what you have now is not good and will not work properly.
Jon

Any unix commands to view network status & activity using the terminal?

I don't use the terminal much and was wondering if there are any unix network commands that let you view packet contents, connection status and other network information. I'm not interested in making any changes, I just want to use the terminal to get network and related information.
Thanks in advance to anybody who answers.
- Mark
G4/450MHz Sawtooth Mac OS X (10.4.7)

Hi Mark,
   There are tons of commands; it would help to know what you want to know. You can monitor the status of all ports with:
sudo lsof +Mi
That will display all network connections and all listening daemons. A command that is similar to that is:
netstat -a -f inet
Of course netstat specializes in network information and there are lots of different stats it will display.
   If you run a firewall, it keeps stats on rule matches. You can see them with:
sudo ipfw -atdN list
   As has already been mentioned, Mac OS X comes with tcpdump but there's only one great packet sniffer: Ethereal. It doesn't come with OS X but if you have X11, it can be installed with a packet manager like Fink.
   Finally, many running services keep their own stats or logs. You would have to read up on the ones you're running to see what information they provide.
Gary
~~~~
   A diplomat is man who always remembers a woman's
   birthday but never her age.
         -- Robert Frost

OSPF with ipsec VTI interface goes down before dead timer.

I have a strange issue that OSPF will initially start working, hellos are exchanged both ways but then after about 3 – 6 hellos one of the sides stops getting them and the ipsec VTI tunnel drops on router A even before the dead timer reaches 0. Is this default behavior, when OSPF is over a VTI interface if it doesn’t receive hellos is drops the tunnel?
I’m at a loss as to what is going on since it looks like only one neighbor stops receiving hellos, router A, for a brief period of time. This VTI tunnel is going over another provider’s FW and they have assured me the tunnel destination/source ips are wide open they also sent me the ACL and I can verify this. The weird thing is if I enable EIGRP it works great with no issues. On router B I am using the same source/ip unnumbered interface on multiple VTI tunnels to to other destinations but this shouldn’t cause any issues I don’t think. I have never had an issue like this and from what I can tell the router A just stops briefly getting hellos after 3 – 6 initial hellos and drops the protocol on the VTI interface. If I set the dead timer on router A long enough it will stop receiving hellos but stay up and then after a while you get “LOADING to FULL” as the hellos start coming in again. Again the tunnel goes over a cisco 800 which I have no control over it and a potential FW before that but I saw the ACL and ip is being allowed. I was thinking this could be a trolling issue on the FW but it doesn’t explain why EIGRP works. FYI I was having a recursive routing issue before but I have since fixed that and the issue still continues.
******** it turns out that i was using the same source ip on multiple tunnels. IPsec would get confused with packets coming in and would deliver packets to the wrong tunnel interface. This was solved but using the key command with a different key number on each set of tunnels with the shared profile command
"If more than one mGRE tunnel is configured on a router that use the same tunnel source address, the shared keyword must be added to the tunnel protection command on all such tunnel interfaces. Each mGRE tunnel interface still requires a unique tunnel key, NHRP network-ID, and IP subnet address. This is common on a branch router when a dual DMVPN cloud topology is deployed. "
Router A:
router ospf 1
router-id 10.213.22.2
passive-interface default
network x.x.97.26 0.0.0.0 area 0
interface Tunnel1
ip unnumbered GigabitEthernet0/1
ip virtual-reassembly in
ip tcp adjust-mss 1398
ip ospf network point-to-point
load-interval 30
tunnel source GigabitEthernet0/1
tunnel mode ipsec ipv4
tunnel destination x.x.173.109
tunnel path-mtu-discovery
tunnel protection ipsec profile VTI-to-NB
router B:
router ospf 1
router-id 172.17.2.6
priority 1
redistribute static subnets route-map Lan-static-RM
passive-interface default
no passive-interface Tunnel1
no passive-interface Tunnel4
no passive-interface Tunnel5
network x.x.173.109 0.0.0.0 area 0
network 172.17.2.6 0.0.0.0 area 0
network 192.168.1.47 0.0.0.0 area 0
interface Tunnel4
ip unnumbered GigabitEthernet0/2
ip virtual-reassembly in
ip tcp adjust-mss 1398
ip ospf network point-to-point
load-interval 30
tunnel source GigabitEthernet0/2
tunnel mode ipsec ipv4
tunnel destination x.x.97.26
tunnel path-mtu-discovery
tunnel protection ipsec profile VTI_NB_to_dorrance_prv
end
thanks P

Disclaimer
The Author of this posting offers the information contained within this posting without consideration and with the reader's understanding that there's no implied or expressed suitability or fitness for any purpose. Information provided is for informational purposes only and should not be construed as rendering professional advice of any kind. Usage of this posting's information is solely at reader's own risk.
Liability Disclaimer
In no event shall Author be liable for any damages whatsoever (including, without limitation, damages for loss of use, data or profit) arising out of the use or inability to use the posting's information even if Author has been advised of the possibility of such damage.
Posting
I haven't studied your config, but I can tell you I have production environment using OSPF across VTI (and GRE, and GRE/IPSec and DMVPN) tunnels without issue. I.e. so OSPF can be okay with VTI tunnels.

XR OS OSPF network command

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