Multipoint GRE with NHRP problem

[lehpoh]

I have one hub(cisco 2621)(2M link) and 9 spokes (Cisco 1721)(512k link) network. I am using Multipoint GRE with NHRP to interconnect them and I am running OSPF. My spokes always recieve about 10 following messages per day.

%NHRP-3-PAKREPLY: Receive Resolution Reply packet with error - insufficient resources(5)

Is this a bug?

Later I setup a lab with 2 1721 routers with one being a hub and another being a spoke. Both of them are connected through fast ethernet interface and running OSPF. I still receive the following message:

%NHRP-3-PAKREPLY: Receive Resolution Reply packet with error - insufficient resources(5)

So, I don't think my 2621 router is too busy in replying spokes NHRP request. Anyone know how to solve this problem?

Thanks a lot.

[yusuff]

Might be CSCdt23105 - title "NHRP-3-PAKREPLY - insufficient resources reported"

Investigate the buffer misses/trims/created pools on your router using 'show buffers'. Look out ifor anomalies. If you are getting lots of misses/trims/created on a particular type, you might need to tweak and increase buffer pool to avoid excesive misses/trims/created. This can avoid instabilities in memory management that affect applications such as nhrp here.

Also investigate number of input drops on your interfaces. E.g. see output below whcih has high Input drops on Interfac Fa0/0 (996) and Fa0/1 (901)

Input drops occur when you do not have enough buffers to satisfy the packets arriving on the

respective interfaces.

router#sh int | incl protocol|drops

FastEthernet0/0 is up, line protocol is up

Input queue: 0/75/996/0 (size/max/drops/flushes); Total output drops: 0

FastEthernet0/1 is up, line protocol is up

Input queue: 0/75/901/0 (size/max/drops/flushes); Total output drops: 0

Hope that helps.

R/Yusuf

[lehpoh]

There is no packets drop at all the interface. I have increased the buffer size for those buffer which has failure/miss but I still receive that error messages.

[TOBY JESSUP]

Hello,

I am researching mGRE on behalf of a customer. Would you send me a configuration? I want to see what mGRE with HSRP generally requires (not the DMVPN stuff). Just the mGRE parts of a config. Thanks!

[TOBY JESSUP]

my email is jjessup@qwest.com

[u.griemert]

use

"ip cef"

and

"no ip route-cache

no ip mroute-cache"

on tunnel interface