Only an IOS upgrade can help

Istvan Csikos · ‎05-06-2015

Hi All,

I am facing with an issue with one command on Catalyst 6504-E. According to the IOS Command reference the command: ip name-server [vrf vrf-name] server-address1 [server-address2...server-address6] with the vrf option was introduced fisrt in the IOS version 12.4T.

I try to configure the dns server IP addresses to my management VRF. I have a management Loopback together with the routing for the management devices (jump-server, nms, dns-server, etc.) I have no issue to reach the servers in the VRF. The problem is that I can't define the "ip name-server" in the VRF. It is not VRF aware for me. The option doesn't exist, as you can see below (I copied form my CLI):

KD02-NORD(config)#ip name-server ?
A.B.C.D Domain server IP address (maximum of 6)
X:X:X:X::X Domain server IP address (maximum of 6)

KD02-NORD(config)#ip name-server

I have 2 different supervisors in several devices: a 2T and a 720. The IOS versions are used: s2t54-advipservicesk9-mz.SPA.151-1.SY1.bin and s72033-advipservicesk9_wan-vz.122-33.SXH8.bin.

Did anyone of you have the same issue? Do you maybe have an official answer from Cisco TAC?

Thank you for the answers in advance!

Regards, Istvan

Istvan Csikos · ‎06-16-2015

Only an IOS upgrade can help in this case. See answer from TAC below:

I was doing some recreation and I found that the VRF aware DNS is working with 15.2(1)SY1

According Bu discussion 15.1(1)SY1 the VRF aware DNS feature was not added here is the results

Repro Results, with s2t54-advipservicesk9-mz.SPA.151-1.SY1.bin

DNS vrf Not appearing
ROM: System Bootstrap, Version 12.2(50r)SYS2, RELEASE SOFTWARE (fc1)

F340.21.15-6500-5 uptime is 1 hour, 29 minutes
Uptime for this control processor is 1 hour, 29 minutes
System returned to ROM by reload at 15:15:01 UTC Fri Jun 12 2015
System image file is "bootdisk:s2t54-advipservicesk9-mz.SPA.151-1.SY1.bin";
Last reload reason: Reload Command

This product contains cryptographic features and is subject to United
States and local country laws governing import, export, transfer and
use. Delivery of Cisco cryptographic products does not imply
third-party authority to import, export, distribute or use encryption.
Importers, exporters, distributors and users are responsible for
compliance with U.S. and local country laws. By using this product you
agree to comply with applicable laws and regulations. If you are unable
to comply with U.S. and local laws, return this product immediately.

A summary of U.S. laws governing Cisco cryptographic products may be found at:
http://www.cisco.com/wwl/export/crypto/tool/stqrg.html

If you require further assistance please contact us by sending email to
export@cisco.com.

cisco WS-C6504-E (M8572) processor (revision ) with 1785856K/262144K bytes of memory.
Processor board ID FXS1723Q1HR
CPU: MPC8572_E, Version: 2.1, (0x80E80021)
CORE: E500, Version: 3.0, (0x80210030)
CPU:1500MHz, CCB:600MHz, DDR:600MHz
L1: D-cache 32 kB enabled
I-cache 32 kB enabled

Last reset from s/w reset
1 Virtual Ethernet interface
27 Gigabit Ethernet interfaces
2 Ten Gigabit Ethernet interfaces
2543K bytes of non-volatile configuration memory.

Configuration register is 0x2102

F340.21.15-6500-5#conf t
Enter configuration commands, one per line. End with CNTL/Z.
F340.21.15-6500-5(config)#ip name-
F340.21.15-6500-5(config)#ip name-server ?
A.B.C.D Domain server IP address (maximum of 6)
X:X:X:X::X Domain server IPv6 address (maximum of 6)

F340.21.15-6500-5(config)#ip name-server 1.1.1.1 ?
A.B.C.D Domain server IP address (maximum of 6)
X:X:X:X::X Domain server IPv6 address (maximum of 6)
<cr>

Repro Results, with s2t54-advipservicesk9-mz.SPA.152-1.SY1.bin

F340.21.15-6500-5>sh ver
Cisco IOS Software, s2t54 Software (s2t54-ADVENTERPRISEK9-M), Version 15.2(1)SY1, RELEASE
SOFTWARE (fc5)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2015 by Cisco Systems, Inc.
Compiled Mon 11-May-15 00:54 by prod_rel_team

ROM: System Bootstrap, Version 12.2(50r)SYS2, RELEASE SOFTWARE (fc1)

F340.21.15-6500-5 uptime is 5 minutes
Uptime for this control processor is 6 minutes
System returned to ROM by reload at 21:32:57 UTC Fri Jun 12 2015
System image file is "bootdisk:s2t54-adventerprisek9-mz.SPA.152-1.SY1.bin";
Last reload reason: Reload Command

This product contains cryptographic features and is subject to United
States and local country laws governing import, export, transfer and
use. Delivery of Cisco cryptographic products does not imply
third-party authority to import, export, distribute or use encryption.
Importers, exporters, distributors and users are responsible for
compliance with U.S. and local country laws. By using this product you
agree to comply with applicable laws and regulations. If you are unable

F340.21.15-6500-5>
F340.21.15-6500-5>
F340.21.15-6500-5>
F340.21.15-6500-5>
F340.21.15-6500-5>en
F340.21.15-6500-5#conf t
Enter configuration commands, one per line. End with CNTL/Z.
F340.21.15-6500-5(config)#ip na
F340.21.15-6500-5(config)#ip nam
F340.21.15-6500-5(config)#ip name-server ?
A.B.C.D Domain server IP address (maximum of 6)
X:X:X:X::X Domain server IPv6 address (maximum of 6)
vrf Specify VRF

F340.21.15-6500-5(config)#ip name-server vrf
F340.21.15-6500-5(config)#ip name-server vrf ?
WORD VRF name

F340.21.15-6500-5(config)#ip name-server vrf mgmt ?
A.B.C.D Domain server IP address (maximum of 6)
X:X:X:X::X Domain server IPv6 address (maximum of 6)

F340.21.15-6500-5(config)#ip name-server vrf mgmt

So there is not other choice than upgrading the IOS

Issue with "ip name-server vrf [vrf-name]" command on Catalyst 6504-E