Nexus 7009 can ping Hostname but not Telnet

Richard Bradfield · ‎01-03-2014

Just installing my first Nexus 7009, come across a minor problem when trying to telnet from the Nexus

can ping a hostname ok but can't telnet hostname, but ok if I use the IP address , see output below

ping Hostname
Using IP address of interface loopback0
Using IP address of interface loopback0
Using IP address of interface loopback0
PING Hostname.xxxx.com.au (172.17.140.1): 56 data bytes
64 bytes from 172.17.140.1: icmp_seq=0 ttl=250 time=23.185 ms
64 bytes from 172.17.140.1: icmp_seq=1 ttl=250 time=23.196 ms
64 bytes from 172.17.140.1: icmp_seq=2 ttl=250 time=23.106 ms
64 bytes from 172.17.140.1: icmp_seq=3 ttl=250 time=23.018 ms
64 bytes from 172.17.140.1: icmp_seq=4 ttl=250 time=23.086 ms

--- Hostname.xxxx.com.au ping statistics ---
5 packets transmitted, 5 packets received, 0.00% packet loss
round-trip min/avg/max = 23.018/23.118/23.196 ms

telnet Hostname
telnet: Invalid host/interface Hostname.

telnet 172.17.140.1
Trying 172.17.140.1...
Using IP address of interface loopback0
Connected to 172.17.140.1.
Escape character is '^]'.

username:

any ideas?

mtsb · ‎01-03-2014

Hi there,

What is the version you are using? I can be https://tools.cisco.com/bugsearch/bug/CSCtq91381.

Thanks,

Madhu

glen.grant · ‎01-04-2014

You would have to have the 7000 setup to point to a dns server otherwise there is no way to translate the server name . Search on setting up a ip domain name lookup on a 7000.

mtsb · ‎01-04-2014

My assumption was when he tried to ping using host name it translated fine but just that the telnet was not working

Sent from Cisco Technical Support Android App

Richard Bradfield · ‎01-04-2014

Madhu,

Your assumptions are correct, I can ping the Hostname but not Telnet to the Hostname, I can telnet to the IP address

I am running System Version: 6.2(2) in the bug you referenced it only mentions version 5 OS, so I wonder if it has not been fixed in release 6 OS

regards

Richard

glen.grant · ‎01-04-2014

You are right. It wouldn't be the first time they reintroduced a bug in a later release.