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Verifying That Layer 3 Subinterfaces Are Working

Purpose

After configuring Layer 3 subinterfaces, verify they are set up properly and transmitting data.

Action

Use the show interfaces command to determine if you successfully created the subinterfaces and the links are up:

user@switch> show interfaces interface-name terse

Interface              Admin Link Proto    Local                 Remote
ge-0/0/0               up    up
ge-0/0/0.0             up    up   inet     1.1.1.1/24
ge-0/0/0.1             up    up   inet     2.1.1.1/24
ge-0/0/0.2             up    up   inet     3.1.1.1/24
ge-0/0/0.3             up    up   inet     4.1.1.1/24
ge-0/0/0.4             up    up   inet     5.1.1.1/24
ge-0/0/0.32767         up    up

Use the ping command from a device on one subnet to an address on another subnet to determine if packets were transmitted correctly on the subinterface VLANs:

user@switch> ping ip-address

PING 1.1.1.1 (1.1.1.1): 56 data bytes
64 bytes from 1.1.1.1: icmp_seq=0 ttl=64 time=0.157 ms
64 bytes from 1.1.1.1: icmp_seq=1 ttl=64 time=0.238 ms
64 bytes from 1.1.1.1: icmp_seq=2 ttl=64 time=0.255 ms
64 bytes from 1.1.1.1: icmp_seq=3 ttl=64 time=0.128 ms
--- 1.1.1.1 ping statistics ---
4 packets transmitted, 4 packets received, 0% packet loss

Meaning

The output confirms that the subinterfaces are created and the links are up.