Hello all.
I'm using DMVPN tunnels in my network and all goes well, but few weeks ago a got some problem: two my DMVPN tunnels stop receveing any data until they were rebooted. I'm using 881G routers as spokes and 3945e as hub. I had tried google this problem, found the same questions and no answers. I hope i will get some help at Cisco Support Community.
Config of hub (relevant parts):
interface GigabitEthernet0/0.526
description BeelineLokal
encapsulation dot1Q 622
ip address 10.200.1.49 255.255.255.192
ip nat outside
no ip virtual-reassembly in max-reassemblies 1024
standby 2 ip 10.200.1.2
ip tcp adjust-mss 1450
no cdp enable
end
interface Tunnel2000
description DMVPN for Beeline WAN Kiev
ip address 10.1.160.1 255.255.255.0
no ip redirects
ip mtu 1400
ip nhrp authentication *****
ip nhrp map multicast dynamic
ip nhrp network-id ***
ip nhrp holdtime 10
ip nhrp registration no-unique
delay 500
tunnel source 10.200.1.2
tunnel mode gre multipoint
end
Spoke:
interface FastEthernet4
ip address 10.200.1.178 255.255.255.252
duplex auto
speed auto
end
interface Tunnel0
description DMVPN for BeeLine WAN Ukraine
bandwidth 1000
ip address 10.1.160.** 255.255.255.0
no ip redirects
ip mtu 1400
ip nhrp authentication ***
ip nhrp map 10.1.160.1 10.200.1.2
ip nhrp map multicast 10.200.1.2
ip nhrp network-id ***
ip nhrp holdtime 10
ip nhrp nhs 10.1.160.1
delay 100
tunnel source FastEthernet4
tunnel mode gre multipoint
end
debug from spoke:
Jun 27 13:56:08.493: NHRP-ATTR: Requester Ext Len: Total ext_len with NHRP attribute VPE 56
Jun 27 13:56:08.493: NHRP: Attempting to send packet via DEST 10.1.160.1
Jun 27 13:56:08.493: NHRP: Encapsulation succeeded. Sending NHRP Control Packet NBMA Address: 10.200.1.2
Jun 27 13:56:08.493: NHRP: Send Registration Request via Tunnel0 vrf 0, packet size: 108
Jun 27 13:56:08.493: src: 10.1.160.19, dst: 10.1.160.1
Jun 27 13:56:08.493: (F) afn: AF_IP(1), type: IP(800), hop: 255, ver: 1
Jun 27 13:56:08.493: shtl: 4(NSAP), sstl: 0(NSAP)
Jun 27 13:56:08.493: pktsz: 108 extoff: 52
Jun 27 13:56:08.493: (M) flags: "unique nat ", reqid: 69798
Jun 27 13:56:08.493: src NBMA: 10.200.1.166
Jun 27 13:56:08.493: src protocol: 10.1.160.19, dst protocol: 10.1.160.1
Jun 27 13:56:08.493: (C-1) code: no error(0)
Jun 27 13:56:08.493: prefix: 32, mtu: 17916, hd_time: 10
Jun 27 13:56:08.493: addr_len: 0(NSAP), subaddr_len: 0(NSAP), proto_len: 0, pref: 0
Jun 27 13:56:08.493: NHRP: 132 bytes out Tunnel0
Jun 27 13:56:08.493: NHRP: Resetting retransmit due to hold-timer for 10.1.160.1
Before Cisco i'm using MS RRAS at my branch and all was fine.
