Sorry for the lapse in posting. I am working on something that I think is pretty cool. Should be ready for publication soon!
But back to IOS XR for a quick post!
A really cool thing with IOS XR is interface wildcards.
If you want to only see the Loopback interfaces, all of them. Normally you would do something like Show int br | in Loop, but with XR you can use a wildcard (*)
RP/0/7/CPU0:R1#sh int l* br
Mon Apr 16 17:21:08.088 UTC
Intf Intf LineP Encap MTU BW
Name State State Type (byte) (Kbps)
Lo0 up up Loopback 1500 0
Lo100 up up Loopback 1500 0
Lo666 up up Loopback 1500 0
Lo667 up up Loopback 1500 0
Lo1000 up up Loopback 1500 0
This works the same if you want to see this in the running config:
RP/0/7/CPU0:R1#sh run in l*
Mon Apr 16 17:21:53.360 UTC
ipv4 address 184.108.40.206 255.255.255.255
ipv6 address 2001::1/128
ipv4 address 100.100.100.100 255.255.255.255
ipv4 address 220.127.116.11 255.255.255.255
ipv4 address 18.104.22.168 255.255.255.255
ipv4 address 22.214.171.124 255.255.255.255
Told ya it was going to be a quick on!