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danny.hernandez
Beginner

Buffer problems -- LDP Neighbors Down

Hi, I have a problem with my LDP Neighbors when an ATM interface flaps. When the Physical IF flaps, the LDP Neighbors over other IF goes down.

The show buffers show me a peak at the same time of the failiure.

# sh buffers
Buffer elements:
     1118 in free list (500 max allowed)
     4022421 hits, 0 misses, 1119 created

Public buffer pools:
Small buffers, 104 bytes (total 50, permanent 50, peak 95 @ 4d19h):
     47 in free list (20 min, 150 max allowed)
     10116037 hits, 49 misses, 78 trims, 78 created
     3 failures (0 no memory)
Middle buffers, 600 bytes (total 28, permanent 25, peak 145 @ 3w1d):
     28 in free list (10 min, 150 max allowed)
     2400429 hits, 250 misses, 494 trims, 497 created
     51 failures (0 no memory)
Big buffers, 1536 bytes (total 50, permanent 50):
     50 in free list (5 min, 150 max allowed)
     410966 hits, 0 misses, 0 trims, 0 created
     0 failures (0 no memory)
VeryBig buffers, 4520 bytes (total 11, permanent 10, peak 13 @ 4d19h):
     10 in free list (0 min, 100 max allowed)
     319327 hits, 2 misses, 3 trims, 4 created
     0 failures (0 no memory)

: %ENTITY_ALARM-6-INFO: CLEAR CRITICAL AT2/0 Physical Port Link Down
%TDP-5-INFO: ATM2/0.239118: LDP started
%LINK-3-UPDOWN: Interface ATM2/0, changed state to up
. %LINEPROTO-5-UPDOWN: Line protocol on Interface ATM2/0, changed state to up
%LDP-5-NBRCHG: LDP Neighbor 10.10.66.171:0 (1) is UP
: %OSPF-5-ADJCHG: Process 66, Nbr 10.10.66.171 on ATM2/0.239118 from LOADING to FULL, Loading Done
%LDP-5-NBRCHG: LDP Neighbor 10.10.66.129:0 (4) is DOWN (Received error notification from peer: Holddown time expired)
: %LDP-5-NBRCHG: LDP Neighbor 10.10.66.50:0 (2) is DOWN (Received error notification from peer: Holddown time expired)
%LDP-5-NBRCHG: LDP Neighbor 10.10.66.230:0 (3) is DOWN (Received error notification from peer: Holddown time expired)
%LDP-5-NBRCHG: LDP Neighbor 10.10.66.50:0 (5) is UP
%LDP-5-NBRCHG: LDP Neighbor 10.10.66.230:0 (6) is UP
. %LDP-5-NBRCHG: LDP Neighbor 10.10.66.129:0 (2) is UP

Why is this ??

7 REPLIES 7
Reza Sharifi
Hall of Fame Expert

Danny,

May be memory leak.

What version of IOS are you running?

Reza

The Device is a 7206 VXR With NPE-G2

The IOS version is : c7200p-spservicesk9-mz.122-33.SRC4.bin

daniel.sandstrom
Beginner

Hi,


I have had similiar issues , did you find a solution for this ?

We think that the problem is relationated with a high CPU in a small moments. We take the following action.

Configure this command

process-max-time 50

We have the device under monitoring, if the problem happens again, We will tune the buffers.

danny.hernandez
Beginner

We think that the problem is relationated with a high CPU in a small moments. We take the following action.

Configure this command

process-max-time 50

We have the device under monitoring, if the problem happens again, We will tune the buffers.

Did you get the recommendation to lower the process-max-time from the TAC ?

I get the recommendation from the Cisco´s Advanced Services Team.