[j-nsp] LDP flaps specifically present on ACX Juniper routers (ACX4000 and ACX1100)

[raf]

Hi,

Is your RE cpu utilisation is OK or not ?

I have similars issues on EX during snmp polling, which are eating all 
the cpu time.

-- 

Raphael Mazelier


Le 28/04/2016 à 17:38, joel ahumuza a écrit :
> Hi All,
>
> We are experiencing an issue with ACX routers running on 12.3X54-D20.7
> where the LDP sessions are continuously flapping, the logs indicate the
> following;
>
> Apr 21 03:36:31  hostname rpd[2299]: RPD_LDP_SESSIONDOWN: LDP session
> x.x.x.x is down, reason: hold time expired
> Apr 21 03:36:34  hostname rpd[2299]: RPD_LDP_NBRDOWN: LDP neighbor x.x.x.x
> (lo0.0) is down
> Apr 21 03:36:38  hostname rpd[2299]: RPD_LDP_NBRDOWN: LDP neighbor x.x.x.x
> (lo0.0) is down
> Apr 21 03:36:38  hostname rpd[2299]: RPD_LDP_SESSIONDOWN: LDP session
> x.x.x.x is down, reason: all adjacencies down
> Apr 21 03:55:34  hostname rpd[2299]: RPD_LDP_SESSIONDOWN: LDP session
> x.x.x.x is down, reason: received notification from peer
> Apr 21 03:55:34  hostname rpd[2299]: RPD_LDP_SESSIONDOWN: LDP session
> x.x.x.x is down, reason: received notification from peer
> Apr 21 03:55:35  hostname rpd[2299]: RPD_LDP_SESSIONDOWN: LDP session
> x.x.x.x is down, reason: received notification from peer
> Apr 21 03:55:35  hostname rpd[2299]: RPD_LDP_SESSIONDOWN: LDP session
> x.x.x.x is down, reason: received notification from peer
>
> The physical connections are okay, no flaps or errors on the p2p connections
> We are running ISIS as the IGP, whose adjacency is stable.
>
> Actions taken from our team was;
> - Increase the hold time setting on the ldp enabled interfaces.
> - Increase the time interval on the same ldp enabled interfaces.
> - setting the ldp session protection setting on the ldp enabled loopback
> interface.
>
> Unfortunately the actions did not yield much since the flaps have been
> ongoing.
>
> Anyone have any Idea on what the problem / solution might be?
>