Linux command: ssh/scp/ping/traceroute/apt-get/telnet

If management VRF is enabled, and you want to find the next-hop route in management VRF when running the commands traceroute/SCP/ping/apt get/SSH at Linux prompt, that is, using Eth0/1 management interface as the route interface, you have to add ip vrf exec mgmt-vrf before the commands.

The example format of these commands is shown below:

sudo ip vrf exec <mgmt-vrf|vrf-name> traceroute 10.10.51.11

sudo ip vrf exec <mgmt-vrf|vrf-name> scp admin@10.10.51.18:/home/Pica8.pm

sudo ip vrf exec <mgmt-vrf|vrf-name> ping 10.10.51.1

sudo ip vrf exec <mgmt-vrf|vrf-name> apt-get update

sudo ip vrf exec <mgmt-vrf|vrf-name> ssh <ip-address>

sudo ip vrf exec <mgmt-vrf|vrf-name> telnet {<ip-address>|<host-name>} [<port-number>]

ip vrf exec <mgmt-vrf|vrf-name> is added to specify which VRF to run the command in. If not specified, find the next hop routing information from the default VRF.

For example,

The following command traceroutes the gateways for the host with the IP address 10.10.50.33 in default VRF.

admin@PICOS:~$ sudo traceroute 10.10.51.33
traceroute to 10.10.51.33 (10.10.51.33), 30 hops max, 60 byte packets
 1  10.10.51.57 (10.10.51.57)  3060.699 ms !H  3060.613 ms !H  3060.588 ms !H

The following command checks whether the host at 10.10.51.1 is reachable in default VRF.

admin@PICOS:~$ sudo ping 10.10.51.1
PING 10.10.51.1 (10.10.51.1) 56(84) bytes of data.
64 bytes from 10.10.51.1: icmp_seq=1 ttl=64 time=1.94 ms
64 bytes from 10.10.51.1: icmp_seq=2 ttl=64 time=2.03 ms
64 bytes from 10.10.51.1: icmp_seq=3 ttl=64 time=2.00 ms
64 bytes from 10.10.51.1: icmp_seq=4 ttl=64 time=146 ms
64 bytes from 10.10.51.1: icmp_seq=5 ttl=64 time=2.01 ms
  
 
--- 10.10.51.1 ping statistics ---
5 packets transmitted, 5 received, 0% packet loss, time 4003ms
rtt min/avg/max/mdev = 1.943/30.832/146.173/57.670 ms

The following command checks whether the host at 10.10.51.205 is reachable in management VRF.

admin@PICOS:~$ sudo ip vrf exec mgmt-vrf ping 10.10.51.205
PING 10.10.51.205 (10.10.51.205) 56(84) bytes of data.
64 bytes from 10.10.51.205: icmp_seq=1 ttl=255 time=0.746 ms
64 bytes from 10.10.51.205: icmp_seq=2 ttl=255 time=1.17 ms
64 bytes from 10.10.51.205: icmp_seq=3 ttl=255 time=1.72 ms
64 bytes from 10.10.51.205: icmp_seq=4 ttl=255 time=1.36 ms
^C
--- 10.10.51.205 ping statistics ---
4 packets transmitted, 4 received, 0% packet loss, time 3044ms
rtt min/avg/max/mdev = 0.746/1.249/1.722/0.352 ms

The following command connects to 10.10.51.205 in management VRF using the default Telnet port (23).

admin@PICOS:~$ sudo ip vrf exec mgmt-vrf telnet 10.10.51.205
Trying 10.10.51.205...
Connected to 10.10.51.205.
Escape character is '^]'.


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