I am running IOS Version 12.2(27)SBA4 on a 7206vxr. I have the following cards:
PA-MC-2E1-120 Channelized E1 (balanced) Port adapter, 2 ports
PA-4T+= Mx serial Port adapter, 4 ports
When I run 'show interfaces' for a physical interface configured on the latter, the output contains states for each carrier (DCD, DSR, DTR, RTS and CTS).
When I run 'show interfaces' for a channel group configured on the channelized card, the only carrier information displayed is "2 carrier transitions". There is no detail on DCD, DSR, DTR, RTS or CTS state.
I would like to understand why this is. Are carrier states relevant here? Is there another command I can use to get this information?
The DCD, DSR, DTR, RTS and CTS are specific to serial interfaces, not E1 interfaces. That is why you don't see those for your E1 interfaces. There is no such command that will allow you to see it for an E1 interface because these parameters are not relevant to E1 interfaces.
thanks for your reply. This is useful information. However, I am still slightly confused. The show interfaces output for a channel group includes the line "2 carrier transitions" but does not detail which carriers. Can you explain?
This document gives several answers on frequently asked questions for PFRv3 channel state behavior.
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