From: Ovais Iqbal (ovais.iqball@yahoo.com)
Date: Thu Oct 16 2008 - 12:30:40 ART
hi all, how are you, i just have a simple MPLS query
see i have 3 routers connected serially to each other.
on R1 what i did, i made a loopback, a serial interface serial 1/0 with no
keepalive to take it to up state and another serial link serial 1/2 connected
to R2.
I just enabled mpls ip on serial connected to R2 and ran ospf on all
links.This is wat i got when i ran show mpls forwarding-table on R1
for loopback my outgoing label or vc was UNTAGGED !!!!!
for my serial (no keepalive) it was POP TAG !!! Why is that so ??
where will i see untagged ?? i heard someone saying that we will see untagged
on interface that are not running mpls, but i m not running mpls on serial1/0
then why am i seeing pop tag on serial 1/0 ?? shouldnt it be UNTAGGED ?
Kindly clear my confusion ? pls explain me when i should be seeing untagged
and when pop tag, i am a totally new bie so pls explain Thanks
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