IPv6 Address management

Hi,
we are at the stage where we are now looking to begin implementing IPv6 in the network. Not wanting to rush into this and end up with something unmanageable, our initial consideration is address management. Due to the large number of address' we are looking for advice on address management software, which seems to be a little thin on the ground.
So the question is, how are those people who are already using v6 managing their address allocations and what software is the most useable and popular? Value for money is also a consideration, any advice most welcome,
Thanks
Toby

Similar Messages

IPv6 Address Management and Security Questions

I'm trying to draft an IPv6-based version of our location's current routing configuration in anticipation of when our ISP will finally roll it out, and address management has been giving me the biggest headache - ironic, considering IPv6 was supposed to simplify address allocation.
My first config draft was made assuming that I would be getting a static /56 or /60 prefix from the ISP, and I was just going to insert the prefix into my DHCP pools and there would be no issues. That was before reading around and discovering that some ISPs are considering prefix delegation (PD) for both residential and business accounts instead of static blocks. Now I have questions about how to stick as close to the current IPv4 configuration as possible.
For the PD scenario, what I am looking at now are two addresses ranges for each network - a ULA /120 space that I want to control using stateful DHCPv6, and the global space which can be /64 and auto-configured. That way there will be a "private" address space for internal routing in the event of a prefix change or an extended outage. But I'm not sure how the config should look for such a scenario. What I have drafted so far is this:
ipv6 dhcp pool DHCP6_INTERNAL
address prefix FDAB::1:0/120
domain-name whatever.net
dns-server FDAB::1:1
ipv6 dhcp pool DHCP6_DMZ-WIFI
address prefix FDAB::2:0/120
domain-name guest.whatever.net
dns-server FDAB::2:1
interface GigabitEthernet0
description WAN-LINK
ipv6 enable
ipv6 address dhcp
no ipv6 unreachables
no ipv6 redirects
ipv6 flow ingress
ipv6 flow egress
ipv6 virtual-reassembly in
ipv6 nd autoconfig default-route
ipv6 dhcp client pd hint ::/56
ipv6 dhcp client pd ISP-PREFIX
zone-member security OUTSIDE
speed auto
duplex auto
no cdp enable
interface FastEthernet8.1
description VLAN_1-INTERNAL
encapsulation dot1Q 1 native
ipv6 enable
ipv6 address FDAB::1:1/120
ipv6 address ISP-PREFIX ::1:0:0:0:1/64
ipv6 flow ingress
ipv6 flow egress
ipv6 virtual-reassembly in
zone-member security INSIDE
ip tcp adjust-mss 1300
ipv6 dhcp server DHCP6_INTERNAL
ipv6 nd managed-config-flag
ipv6 nd other-config-flag
interface FastEthernet8.2
description VLAN_2-DMZ-WIFI
encapsulation dot1Q 2
ipv6 enable
ipv6 address FDAB::2:1/120
ipv6 address ISP-PREFIX ::2:0:0:0:1/64
ipv6 flow ingress
ipv6 flow egress
ipv6 virtual-reassembly in
zone-member security DMZ
ip tcp adjust-mss 1300
ipv6 dhcp server DHCP6_DMZ-WIFI
ipv6 nd managed-config-flag
ipv6 nd other-config-flag
Will this config work? By which I mean: will the DHCPv6 servers provide ULA addresses, and will SLAAC work for global address allocation? If not, what needs to be changed?
Also, another question. I found a few references to a prefix name (the "ISP-PREFIX") which can be used as part of a static IPv6 address on an interface, which is a good idea in case the prefix changes. But that brings up another concern - if the prefix changes, that will invalidate ACLs referencing the global addresses using the previous prefix. Is there anything similar to the prefix name string that can be used in ACLs to keep this from occurring?

DHCPv6-PD is not necessarily dynamic the same way as DHCP was with the public IPv4 addresses in the IPv4 world.
While the outside network (PPPoE, DHCPv6, anything) might be truly dynamic and changing with possibly every login session, the DHCPv6 delegated prefix might be tied to your login credentials or DHCPv6 client's DUID after the first connection. A bit like a DHCP lease reservation.
If that is the case, there is some possibility that your ISP will run reverse route injection, and will always route your "fixed" prefix to the currently active dynamic "outside" address.
Talk to your ISP and have them confirm that, once the PD'd /48 or /56 is initially assigned, it won't change, and that the same prefix will be delegated every time. Then you can treat it as if it were fully static, and you won't have to go down the ULA path.
I contacted one of our local ISPs, and they're doing it exactly that way: PPPoE for IPv4 and IPv6 (fully dynamic), and DHCPv6-PD with the /48 tied to the PPPoE login credentials. I might change to that ISP sooner or later.
With my current ISP, my IPv6 access is 6RD based. I get a /60, with my current public ipv4 address (by DHCP) embedded into those 60 bits. Readressing is bound to happen sooner or later, and it happens every so often, and it breaks my IPv6 ACLs.
I'm also looking for a way to write IPv6 ACLs with wildcard bits, not prefix/mask, so I can use them with ZBFW. So far, no sign of it.
A few more comments:
ULA addressing:
It may look tempting, plausible and intuitive to use dual global and ULA addressing.
I started this way as well. However, it turns out that Windows 7 has (had?) some issues with proper source address selection. The "longest common prefix" rule never seemed to work properly. In some cases, it would pick the global address to talk to ULA hosts, or stubbornly insist to use the ULA address to talk to an IPv6 internet host. It was a frustrating experience. Be sure to test this to the full extent (and back, and again and then some more) with every operating system you intend to use.
Using /120:
Be sure to test this as well, and very thoroughly. Subnet masks longer than /64 are sometimes called "uncharted territory" in IPv6. Longer subnet masks will break SLAAC, and there may be (embedded) devices that will not react benevolently to a subnet mask other than /64, or simply lack support for DHCPv6.
adjust-mss
I see you have "ip tcp adjust-mss 1300". While PMTUd may be mandatory with IPv6, I found it being broken already :-( . "ipv6 tcp adjust-mss .... " is now a separate command since IOS 15.4(1). I would suggest considering it, depending with your experience with PMTUd on IPv6.

Can't get ipv6 address assigned correctly.

I use NetworkManager and dhclient for auto-configuration but it has some weird problems.
When I boot up my laptop, I only have chance to get access to ipv6 network, when I fail, I tried to delete the connection in Network Management Settings, and then added a new profile, disable and then enable the network again. Sometimes it works well, but sometimes it failed to auto-config.
If I use the command:
$ ip -6 rout
then I'll get the following message:
unreachable fe80::/64 dev lo proto kernel metric 256 error -101
fe80::/64 dev wlan0 proto kernel metric 256
default via fe80::2e0:2ff:fe54:59 dev wlan0 proto static metric 1
every time the default gateway is configured well, sometimes the address the address is missed , and if I do the following:
$ ping6 -I wlan0 -c 4 fe80::2e0:2ff:fe54:59
It responses normally.
PING fe80::2e0:2ff:fe54:59(fe80::2e0:2ff:fe54:59) from fe80::1034:56ff:fe78:9124 wlan0: 56 data bytes
64 bytes from fe80::2e0:2ff:fe54:59: icmp_seq=1 ttl=64 time=5.32 ms
64 bytes from fe80::2e0:2ff:fe54:59: icmp_seq=2 ttl=64 time=6.64 ms
64 bytes from fe80::2e0:2ff:fe54:59: icmp_seq=3 ttl=64 time=10.6 ms
64 bytes from fe80::2e0:2ff:fe54:59: icmp_seq=4 ttl=64 time=3.60 ms
--- fe80::2e0:2ff:fe54:59 ping statistics ---
4 packets transmitted, 4 received, 0% packet loss, time 3005ms
rtt min/avg/max/mdev = 3.603/6.546/10.617/2.587 ms
do the following:
$ ip -6 addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
3: wlan0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qlen 1000
inet6 2001:250:4400:d000::161/128 scope global
valid_lft forever preferred_lft forever
inet6 fe80::1034:56ff:fe78:9124/64 scope link
valid_lft forever preferred_lft forever
I found I just sometimes can get the ipv6 address start with 2001:
If the address is assigned, then:
$ ping6 ipv6.google.com
PING ipv6.google.com(ipv6.google.com) 56 data bytes
^C
--- ipv6.google.com ping statistics ---
11 packets transmitted, 0 received, 100% packet loss, time 10008ms
response nothing!
Then I switch into Windows 7, if something like above happened, then I managed to set the MAC address to a random value such as 12-34-56-78-91-23, soon, the problem will be corrected, I'll get a new ipv6 address assigned by DHCPv6 server. If I switch back to arch, set the MAC address in NetworkManager, it didn't have function at most time, and the ipv6 address even won't change!
Can anyone help me with this problem?
by the way, I never get ipv6 address when I use dhcpcd.

bernarcher wrote:
Hello and welcome to the forums heliumhgy.
Just in case you are wondering where your post has been gone: The moderators board received this message from you:
I dont need tunnel to access to ipv6, My univ use dual-stack to get both ipv4 and v6 work around all campus.
This is because you inadvertently used the "Report" link. But don't worry this happens rather often.
Just cause I caught the glimpse of re-blabla, and mistaken it as reply
Last edited by heliumhgy (2012-11-29 03:16:11)

IPv6 address is not send over WLan

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Hi!
My Cisco router is working fine with Ethernet and IPv6. There is a “little” problem concerning the promotion of IPv6 addresses under WLan. When I’m using WLan the router is not providing any IPv6 addresses, only IPv4. Do you have any clue why the router is not promoting the IPv6 addresses.
btw. I will post the config later on, when I’m at home.
Cheers

It´s an integrated AP!
Here is the Code:
gateway#sh ver
Cisco IOS Software, C870 Software (C870-ADVIPSERVICESK9-M), Version 12.4(15)T11, RELEASE SOFTWARE (fc2)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2009 by Cisco Systems, Inc.
Compiled Thu 29-Oct-09 12:35 by prod_rel_team
ROM: System Bootstrap, Version 12.3(8r)YI2, RELEASE SOFTWARE
gateway uptime is 8 weeks, 13 hours, 17 minutes
System returned to ROM by power-on
System restarted at 20:04:22 MET Thu Apr 29 2010
System image file is "flash:c870-advipservicesk9-mz.124-15.T11.bin"
bridge irb
dot11 ssid v6gregor
   vlan 2
   authentication open
   authentication key-management wpa
   wpa-psk ascii 7 1407051D5A03382E232721
ip dhcp pool wlan_v6
   network 10.11.60.0 255.255.255.0
   default-router 10.11.60.1
   domain-name ipv4.at
   dns-server 195.70.224.45 62.218.28.35
interface Dot11Radio0
description Provisioned by CSM (private interface)
no ip address
load-interval 30
no dot11 extension aironet
encryption vlan 2 mode ciphers tkip
encryption vlan 3 mode ciphers tkip
encryption vlan 1 mode wep optional
ssid daham
ssid open
ssid v6gregor
mbssid
speed basic-1.0 basic-2.0 basic-5.5 6.0 9.0 basic-11.0 12.0 18.0 24.0 36.0 48.0 54.0
power local cck 17
power local ofdm 17
power client 17
channel 2432
station-role root
rts threshold 2312
antenna receive right
interface Dot11Radio0.1
encapsulation dot1Q 1 native
bridge-group 1
bridge-group 1 subscriber-loop-control
bridge-group 1 spanning-disabled
bridge-group 1 block-unknown-source
no bridge-group 1 source-learning
no bridge-group 1 unicast-flooding
interface Dot11Radio0.2
encapsulation dot1Q 2
bridge-group 2
bridge-group 2 subscriber-loop-control
bridge-group 2 spanning-disabled
bridge-group 2 block-unknown-source
no bridge-group 2 source-learning
no bridge-group 2 unicast-flooding
interface BVI1
ip address 10.10.10.1 255.255.255.0
ip nbar protocol-discovery
ip nat inside
ip virtual-reassembly
ip tcp adjust-mss 1300
ipv6 address 2001:938:DAD:400::1/64
ipv6 enable
ipv6 nd prefix 2001:938:DAD:400::/64
ipv6 nd router-preference High
interface BVI2
ip address 10.11.60.1 255.255.255.0
ip nbar protocol-discovery
ip nat inside
ip virtual-reassembly
ipv6 address 2001:938:DAD:800::1/64
ipv6 enable
ipv6 mtu 1300
ipv6 nd prefix 2001:938:DAD:800::/64
ipv6 nd managed-config-flag
ipv6 nd router-preference High
ipv6 nd ra interval 60

IPv6 address autoconfiguration vs static on SF302-08P

I've just installed a 302-08P in my office so that we can get our VoIP trunks into our office, so my officemate and I can actually test
the phones before we hand them out. (Can't do that easily with the 1 RJ-45 facilities gave us...)
I noticed that I can not enable IPv6 address autoconfiguration for the management interface, as well as set a static IPv6 address.
This seems wrong: I want the device to always AC an address: it makes bonjour and renumbering much easier. But,
I want to give the device a static IP for purposes like management, DNS, etc. If this unit failed, I'd replace it but it's address would not change.
IPv6 hosts (which the management interface is) should be completely happy with having multiple addresses on an interface, not just
having addresses from multiple prefixes. What gives?

houmles wrote:I found that I can't have two gateways on one interface, but until now there's no problem.
I suspect it's a problem with that; I've noticed this problem as well.
When trying to add multiple default gateways with iproute2 (ie, `ip r a default via xxx:xxx:xxx::xxxx`) it errors with the error you've mentioned. I'm not sure if this is a kernel bug, iproute2 bug, or not a bug at all.
Having multiple default IPv4 gateways works fine.
I believe netcfg doesn't check for an existing gateway and delete it first (or use `ip r r` instead or `ip r a`) before adding the one; but I haven't checked the code so I could be wrong.
EDIT:
OK, I couldn't resist looking at the code, and it indeed does a 'dumb' addition of the gateway:
112 if [[ -n "$GATEWAY" ]]; then
113 report_debug ethernet_iproute_up ip route add default via "$GATEWAY" dev "$INTERFACE"
114 if ! ip route add default via "$GATEWAY" dev "$INTERFACE"; then
115 report_iproute "Adding gateway $GATEWAY failed"
116 fi
117 fi
I'm looking at making a patch now. Patch and bug report: https://bugs.archlinux.org/task/29480
Last edited by fukawi2 (2012-04-16 01:00:09)

IPv6 address allocation

I've got a best practices question.
We're planning our transition to IPv6. We've gone to ARIN and aquired a /48 for the company. My question is about the best way to manage that space.
Our company already has one a second office location (which is international) in addition to our corporate offices. I expect we will have more within the next couple of years. I can allocate pieces of our /48 to these locations (trying to plan careful to support route aggregation) or I can have each of our international locations get their own /48 from their respective registries.
What's the intent about the best way to handle this?
Thx
Patrick

Hi Patrick,
before jumping to provide an answer I would like you to consider the nature of the network you are building and whether or not you will be using own dedicated links or using the Internet as transmission infrastructure.
In the first case you own provider independent IPv6 addressing could be a good idea if you run BGP. This also would allow you to be multihomed in different countries and could also become a transit AS.
But if you only are forwarding own traffic and have a couple of connection in different countries with stable and reputable ISPs maybe the only thing you need is provider assigned space for each location and you do not even need to run BGP only an IGP to prevent your internal traffic from spilling on the Internet. This would prevent rerouting of traffico from a different link to a network with a failed ISP connection.
You might also consider provider independent address space assigned by RIR in the country where you have your subsidiaries and use BGP to advertise the whole address space to the entire world and achieve redundancy.
Fact is more parameters are needed to answer you question:
Are you running BGP now (do you have an AS number)
Are you (or willing to be) a transit network
Are you looking for multihoming (in a single RIR area or multiple)
How much money are investing to obtain resilience and reliability.
I hope this question will help you better define your problem
Cheers
Fabio

Getaddrinfo function returns IPv4-mapped IPv6 addresses in canonical name

When I use the getaddrinfo function with flag AI_CANONNAME, then in ai_canonname IPv4-mapped IPv6 addresses is returned even for IPV6 disabled machine.
So my question is that from where this canonical name is returned, I didn't found in /etc/nodename /etc/hosts or in /etc/inet/hosts or in /etc/interfacefile files.

It's only showing "unknown" for the IPv6 address.
Go into your IPv6 properties, and set the IP and DNS address settings to be obtained automatically.
Then in Manage network adapters windows, change the view options to show Menu, then click on Advanced, Advanced, and make sure IPv4 is on top instead of IPv6.
Ace Fekay
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Technical Blogs & Videos: http://www.delawarecountycomputerconsulting.com/
This post is provided AS-IS with no warranties or guarantees and confers no rights.

CME - unable to configure H.323 gw using ipv6 address

Hi All
I have installed Call Manager Express 8.0 in 2811 Router and trying to interconnect with other Call Managers using IPV6.
CME works fine in dual stack made with both IPV4 & IPV6 address with the internal network. While trying to connect other Call Manager,I have configured the H.323 Gateway using IPV4 address and i can dial out the numbers..
Since we are functioning this Call Manager in IPV6, i tried configuring the H.323 Gateway using IPv6 address but there is no option to configure IPV6 IP in the "voip bind srcaddress <ip>". Can anyone tell me is it possible to do it & which CME version support ipv6.
Regards,
Lavanya

Hi AS,
Do not use the DHCP on the WLC.
Use a DHCP on the neighbor swtich if possible for the native VLAN.
Regards,
Amjad
Rating useful replies is more useful than saying "Thank you"

IPv6 Addressing Point to Point Links in the enterprise

For an enterprise, it doesn't seem to make sense to use Global addressing for point to point, transit-only links and loopbacks.
Link-local only addressing breaks debugging tools like traceroute, DNS, etc.
Is Unique Local the correct choice for this?
I've searched quite a bit and I've not found a lot of discussion about scope selection for point to point links. Some RFCs such as 6164 imply Global scope vs Unique Local scope usage is a preference. Most discussions of point to point addressing focus on bit length. I'm assuming this means design concerns are agnostic toward scope selection.
Is anyone aware of documentation I've missed or have any recommendations in this area?
If ULA was the correct choice, address hierarchy might look like this:
DataNetwork1 -- Router1 -- ULA.1.1 -- Link -- ULA1.2 -- Agg Router -- Core
DataNetwork2 -- Router2 -- ULA.2.1 -- Link -- ULA2.2 -- Agg Router /
DataNetwork3 -- Router3 -- ULA.3.1 -- Link -- ULA3.2 -- Agg Router /
The network core would have summarized entries for DataNetwork[1|2|3] and ULA[1|2|3]. IE, there would be a Global hierarchy and a ULA hierarchy.

Scott,
Let me break this down into some categories for you.
Address selection:
I believe that best practice is to use Global Unicast Addressing everywhere (coupled with a proper security policy at your edge). ULA was a compromise for Site Local never being properly defined and whilst it can be used in the same way as GUA I don't believe it is worth it. Irrespective of what you use (GUA or ULA), subject to your security and routing policy traceroute will work from both ends (e.g. you tracing out, someone tracing in)
Address masking:
The general rule of thumb is that you allocate /64s to eveything and then mask down to the appropriate mask for the function you are expecting (P.S. Forget everything you learnt about IPv4 address conservation). If you are using /127 masks then in theory every p2p link in your network is either a 0 (::) or a 1 (::1)
e.g.
traceroute HostB:
1     2001:1234:abcd:1::1
2     2001:1234:abcd:2::1
3     2001:1234:abcd:3::1
4     2001::4:10
The only exception to this is loopbacks, you can sequentially allocate /128s from the same /64 block
NOTE: /127 support is recent and may not be supported by some vendors, in this case use /126 masking (same as you would use /30s in IPv4)
If you have a /48 ( a normal enterise allocation) or larger then this should not be an issue ( you have access to 65536 x /64s) the only reason you would consider ULA for infrastructure numbering is because you have a small IPv6 pool. I would still argue you should get more IPv6 addresses than use ULA.
I hope this helps
Cheers

Connect to server using IPv6 address in afp URL

I'm not sure whether this is the correct forum for this question, but does anyone know whether I can specify an IPv6 address in the "Connect to Server" dialog?
I've setup IPv6 over direct-wired ethernet between my MBP and Mini. Using ping6, I can ping one from the other (but only when I specify -I en0)
I've tried the following URLs:
afp://[fe80::0216:cbff:dead:beef]
afp://[fe80::0216:cbff:dead:beef%en0]
I think the problem might be because I don't have an IPv6 router between the two hosts.
Thanks.
MacBook Pro 15 2.0GHz Mac OS X (10.4.8) mini 1.83GHz

I have the same problem and for me it extends to everything from SSH to HTTP. I think that mac has a bug in it networking. I can't get it to work on any mac I've tried. Can your mini connect to your laptop?
I've been googling for 3 days and can't find any solution.
MBP Mac OS X (10.4.9)

PRAA in combination with central address management

Hello,
In our system we have central adress management activated. All the
personell nrs are entered with the correct address (sreetname and
housenumber in 2 separate fields). We use this information to create
the corresponding vendor numbers in FI (transaction PRAA).
However, with transaction PRAA both the address (streetname and
housenumber) are copied into one field (streetname). As a consequence,
the corresponding batch input session, which is using program SAPMF02K,
cannot automatically (in bcakground) create all the vendors, since we
always get a message about central address management. (Streetname does
not exist, because it wrongly contains both the streetname as well as
the housnumber.)
The field USE_ZAV which is automatically ENTERED in the background
processing of the SAPMF02K batch job, is causing this address check.
We think this is a bug.
Ideally the PRAA should be entering the streetname and housnumber in 2
separate fields in FI-vendor master data, of the automatic check of
field USE_ZAV should not be entered in this batch input background
processing.
Can you please give us some advice on how to deal with this situation?
Kind regards
Karinne Van Goethem
SAP Consultant - Holland Casino

XXX

Is it normal?(NetworkManager applet's strange output & 3 IPv6 address)

1) label ppp0 appears in NetworkManager applet every time when I up vpn-connection
2) Also something strange with enp5s0. Output of "ip addr":
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: enp5s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether 10:bf:48:20:61:a4 brd ff:ff:ff:ff:ff:ff
inet 10.0.122.144/8 brd 10.255.255.255 scope global dynamic enp5s0
valid_lft 9283sec preferred_lft 9283sec
inet6 2002:5be2:8e63:b:12bf:48ff:fe20:61a4/64 scope global noprefixroute dynamic
valid_lft 2592003sec preferred_lft 604803sec
inet6 fec0::b:12bf:48ff:fe20:61a4/64 scope site noprefixroute dynamic
valid_lft 2592003sec preferred_lft 604803sec
inet6 fe80::12bf:48ff:fe20:61a4/64 scope link
valid_lft forever preferred_lft forever
3: wlp3s0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq state DOWN group default qlen 1000
link/ether 00:08:ca:67:17:e9 brd ff:ff:ff:ff:ff:ff
9: ppp0: <POINTOPOINT,MULTICAST,NOARP,UP,LOWER_UP> mtu 1400 qdisc pfifo_fast state UNKNOWN group default qlen 3
link/ppp
inet 91.226.141.81 peer 1.1.1.1/32 scope global ppp0
valid_lft forever preferred_lft forever
inet 91.226.141.81/32 brd 91.226.141.81 scope global ppp0
valid_lft forever preferred_lft forever
Is it normal that this interface has three IPv6 addresses?

Hi,
We are hitting the software bug and the bug ID is CSCsz56711
http://tools.cisco.com/Support/BugToolKit/search/getBugDetails.do?method=fetchBugDetails&bugId=CSCsz56711
The issue is related to PCI componenet on the AP hardware and log that points to that is..
bsnInitRcbSlot: slot 0 has venus radio(UNSUPPORT)
The Replacement is the resolution and please contact your reseller or partner and if ur are the partner then RMA ids the resolution..
Lemme know if this answered ur question and please dont forget to rate the usefull posts!!
Regards
Surendra

Regarding the ipv6 address handling

Hi,
Are there any built-in functions in pl/sql for handling ipv6 addresses?
The functions similar to inet_ntop and inet_pton in c++ are available in pl/sql?

The closest I get to it is maybe dbms_network_acl_utility
http://download.oracle.com/docs/cd/E11882_01/appdev.112/e16760/d_networkacl_utl.htm#ARPLS67249
Subprogram Description
CONTAINS_HOST Function
Determines if the given host is equal to or contained in the given host, domain, or subnet
DOMAIN_LEVEL Function
Returns the domain level of the given host name, domain, or subnet
DOMAINS Function
For a given host, this function returns the domains whose ACL assigned is used to determine if a user has the privilege to access the given host or not.
EQUALS_HOST Function
Determines if the two given hosts, domains, or subnets are equal

How to verify if an IPV6 address entered in a textbox is valid ?

Hi,
How to verify if an IPV6 address entered in a text box is valid. I have a swing application. Until now we used only IPV4 address and we had a gui component with only four entries, which checked if the number entered is <= 255, so the user had to enter a correct address. Now with IPV6 there are IPV6 addresses, IPV4 mapped addresses, IPV6 zero compressed addresses and leading zeroes dropped kinds. We cannot supply a fix gui component.
So if I provide a textcomponent which accepts strings - how do i check if the ip addresses entered by the user is valid. Can I use INET6Address to do this ? is there a way ?
Thanks.

InetAddress.getByName(String host)
If it returns an Inet6Address without throwing an exception, I guess that would work.

Anyone know about centarl address management.

hi expert,
nyone know about centarl address management. how to use it in xdo1

Hi
Central address Managements stores the data in ADRC and other ADR* tables
These tables contains the entire address details of the Customers.
KNA1 may contain only few but these ADR* like ADRC contains all.
So when you create Customer usinf XD01, if you create address centrally these tables are filled.
Reward points if useful
Regards
Anji

IPv6 Address management

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