[c-nsp] Cisco and RFC 6106 (RDNS in IPv6 RAs)

Christopher Werny cwerny at ernw.de
Mon Feb 17 18:07:50 EST 2014


Hi Arie,

thank you very much. I appreciate the help.

best,
Chris

-----Original Message-----
From: Arie Vayner (avayner) [mailto:avayner at cisco.com] 
Sent: Dienstag, 18. Februar 2014 00:07
To: Christopher Werny
Cc: cisco-nsp at puck.nether.net
Subject: RE: Cisco and RFC 6106 (RDNS in IPv6 RAs)

Chris,

So we have support for advertising DNS server addresses in RA in the IOS T train since 15.4(1)T  and S train (since 15.3(2)S).

In the future there will also be additional support for DNS search lists.

Tnx
Arie



-----Original Message-----
From: Christopher Werny [mailto:cwerny at ernw.de] 
Sent: Monday, February 17, 2014 01:13
To: Arie Vayner (avayner)
Cc: cisco-nsp at puck.nether.net
Subject: RE: Cisco and RFC 6106 (RDNS in IPv6 RAs)

Hi Arie,

thanks for the quick reply! Looking forward to your update.

Cheers,
Chris

-----Original Message-----
From: Arie Vayner (avayner) [mailto:avayner at cisco.com] 
Sent: Montag, 17. Februar 2014 01:41
To: Christopher Werny; cisco-nsp at puck.nether.net
Subject: RE: Cisco and RFC 6106 (RDNS in IPv6 RAs)

Chris,

The new command is " ipv6 nd ra dns server <address> [lifetime]"

This is the command reference entry:
http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipv6/command/ipv6-cr-book/ipv6-i3.html#wp3800310030

It seems to be officially in IOS-XE, and I am double checking what the status is for IOS. Will update.

HTH
Arie

-----Original Message-----
From: cisco-nsp [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Christopher Werny
Sent: Sunday, February 16, 2014 16:17
To: cisco-nsp at puck.nether.net
Subject: [c-nsp] Cisco and RFC 6106 (RDNS in IPv6 RAs)

Hi everyone,

I haven't seen any "official" announcement that RDNS option in RAs is finally supported in Cisco IOS, and my google/fn-fu did not result in any success (but this could be a typical layer 8 problem ;)). 
However, I stumpeld over an Cisco IOS IPv6 Command Reference Guide which included the command " ipv6 nd ra dns server" that achieves what I am looking for, but I couldn't find any  information on which Devices/IOS trains this command is supported. 

The Reference Guide can be found here: 

http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipv6/command/ipv6-cr-book/ipv6-i3.html#wp3800310030

Does anyone know on which trains/devices this command is supported? or have some general pointers in regards to RFC 6106 support in Cisco IOS?

Thanks for your time !

Cheers,
Chris



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