DNS view-groups don't work on subinterfaces

Working on an implementation of a split DNS design, I encountered an interesting bug in Cisco IOS: the ip dns view-group command works only on interfaces, but not on subinterfaces. As it’s a pure IP feature, there obviously no reason why it shouldn’t work on anything that has an IP address; obviously someone forgot to insert the correct entry in the parser tables.

Here’s a sample configuration session taken from a 7200-series router running IOS release 12.4(15)T5:

c7200(config)#ip dns view-list Test
c7200(cfg-dns-view-list)#interface Serial 1/0
c7200(config-if)#ip dns view-group Test
c7200(config-if)#encapsulation frame-relay
c7200(config-if)#interface Serial 1/0.1 point
c7200(config-subif)#ip dns view-group Test
                        ^
% Invalid input detected at '^' marker.

1 comment:

  1. thanks for the feedback. CSCsu10024 has been opened for you. Enjoy!

    ReplyDelete

You don't have to log in to post a comment, but please do provide your real name/URL. Anonymous comments might get deleted.

Ivan Pepelnjak, CCIE#1354, is the chief technology advisor for NIL Data Communications. He has been designing and implementing large-scale data communications networks as well as teaching and writing books about advanced technologies since 1990. See his full profile, contact him or follow @ioshints on Twitter.