I've just enabled MPLS IGP sync this morning aftere reading a few articles however I'm not convicnced that's going to make much difference, has anyone ever experieced this before?
For anyone that's interested I fixed this problem after some in depth troubleshooting.
Turns out the CCC router has CEF disabled.
I followed the through the following process:
Noticed flushes in the inteface counters -> researched SPD (selective packet discard) -> looked into CPU usage -> noticed IP Input process running 90%+, checked CEF with "show ip cef" showed a full adjancency table.
Checked the command "show cef interface"
Boom, "CEF Switching disabled" on every interface.
"no ip cef" "ip cef" , fixed.
For reference the running config did indeed show "ip cef" as entered and turned on.
Only thing I can think is when we upgraded from 12.4 to 15.0(1)M there was a glitch with CEF....
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