Hi,
We get bad checksum using the following config:
A:network tnip1
; -- IP Tunnel Net Configuration --
enable
mode gre multipoint
source ppp1
path-mtu-discovery
nhrp enable
nhrp authentication dmvpn
nhrp holdtime 300
nhrp map multicast x.x.x.x
nhrp map 172.16.0.1 255.255.255.0 x.x.x.x
nhrp nhs 172.16.0.1
nhrp record
encapsulation
; -- GRE Configuration --
checksum
key 100000
exit
B:!
interface Tunnel1
description MULTI-POINT GRE TUNNEL for BRANCHES
bandwidth 1000
ip address 172.16.0.1 255.255.255.0
no ip redirects
ip nhrp authentication dmvpn
ip nhrp map multicast dynamic
ip nhrp holdtime 300
tunnel source x.x.x.x
tunnel mode gre multipoint
tunnel key 100000
tunnel checksum
!
debug:
Oct 12 08:12:48.505 UTC: NHRP: netid_in = 0, to_us = 1
Oct 12 08:12:48.505 UTC: NHRP: Bad checksumsrc 172.16.0.2 dst 172.16.0.1
Oct 12 08:13:04.592 UTC: NHRP: Receive Registration Request via Tunnel1 vrf 0, packet size: 81
regards
bjornarsb
