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Monday, May 30, 2011

Checking optical interface type


Sometimes you log onto a switch remotely and need to know what kind of optical interface the switches actually have plugged in. It’s pretty simple:

Switch#show interface gi1/0/25 capabilities
GigabitEthernet1/0/25
Model:                 WS-C3750G-24TS
Type:                  1000BaseLX SFP
Speed:                 1000
Duplex:                full
Trunk encap. type:     802.1Q,ISL
Trunk mode:            on,off,desirable,nonegotiate
Channel:               yes
Broadcast suppression: percentage(0-100)
Flowcontrol:           rx-(off,on,desired),tx-(none)
Fast Start:            yes
QoS scheduling:        rx-(not configurable on per port basis),
tx-(4q3t) (3t: Two configurable values and one fixed.)
CoS rewrite:           yes
ToS rewrite:           yes
UDLD:                  yes
Inline power:          no
SPAN:                  source/destination
PortSecure:            yes
Dot1x:                 yes

The most important things here is that you can see that we have a 1000BaseLX SFP installed.

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