Hi all,
I'm working on a network design with several offices and dual WAN connection. Now I'm testing it in a lab, but one router (RTR04) keeps freezing after a link failure (only with multicast enabled). You can see the lab topoplogy in the atachment. There are two connection between the sites, one managed layer 2 vpn (primairy) and DMVPN over an other connection as backup. OSPF runs as routingprotocol between the routers with static routes to RTR03.
When I enable multicast (spare-mode with RTR03 as RP) and kill the l2 connection between RTR01 en 04 then RTR04 freezes. Console does not display anything and does not respond, one ping failure is displayed on screen before frees (interface leds keep blinking/burning even after I unplug the cable). When i configure a static mroute from RTR04 to RTR01 the router does not freeze.
On all routers RTR03 is configured as RP and the interfaces are configured with ip sparse-mode (for dmvpn on the tunnel interface). On RTR04 I can see 01 and 02 as pim neighbour.
I have also tried with sparse-dense mode, but samre result. When the DMVPN interface is down (RTR04 to 02) the routers does not crash when I kill the connection to RTR01.
RTR01
ip multicast-routing
!
interface Loopback1
ip address x.x.x.x 255.255.255.255
!
interface GigabitEthernet0/0
description ** e-VPN **
ip address x.x.x.x 255.255.255.0
ip pim sparse-mode
ip ospf message-digest-key 1 md5 7 xxx
ip ospf hello-interval 1
ip ospf priority 100
ip ospf cost 60
duplex auto
speed auto
!
interface GigabitEthernet0/1
description to RTR02
ip address x.x.x.x 255.255.255.252
ip pim sparse-mode
ip ospf message-digest-key 1 md5 7 xxx
ip ospf hello-interval 1
duplex auto
speed auto
!
interface GigabitEthernet0/2
description to RTR03
ip address x.x.x.x 255.255.255.252
ip pim sparse-mode
duplex auto
speed auto
!
ip pim rp-address x.x.x.x + OSPF config and static routes to RTR03 |
RTR02
ip multicast-routing
!
interface Loopback1
ip address x.x.x.x 255.255.255.255
!
interface Tunnel0
description ** DMVPN **
bandwidth 50000
ip address x.x.x.x 255.255.255.0
no ip redirects
ip mtu 1400
ip nhrp authentication xxx
ip nhrp map multicast dynamic
ip nhrp network-id 100
ip nhrp holdtime 60
ip nhrp registration timeout 20
ip tcp adjust-mss 1360
ip ospf message-digest-key 1 md5 7 xxx
ip ospf network broadcast
ip ospf hello-interval 4
ip ospf priority 100
ip ospf cost 80
tunnel source GigabitEthernet0/0
tunnel mode gre multipoint
tunnel key xxx
!
interface GigabitEthernet0/0
description ** DMVPN **
ip address x.x.x.x 255.255.255.0
duplex auto
speed auto
!
interface GigabitEthernet0/1
description to RTR01
ip address x.x.x.x 255.255.255.252
ip pim sparse-mode
ip ospf message-digest-key 1 md5 7 xxx
ip ospf hello-interval 1
duplex auto
speed auto
!
interface GigabitEthernet0/2
description to RTR03
ip address x.x.x.x 255.255.255.252
ip pim sparse-mode
ip ospf hello-interval 1
duplex auto
speed auto
!
ip pim rp-address x.x.x.x + OSPF config and static routes to RTR03 |
RTR04
ip multicast-routing
!
interface Loopback1
ip address x.x.x.x 255.255.255.255
!
interface Tunnel0
bandwidth 1000
ip address x.x.x.x 255.255.255.0
no ip redirects
ip mtu 1400
ip nhrp authentication xxx
ip nhrp map x.x.x.x x.x.x.x
ip nhrp network-id 100
ip nhrp holdtime 60
ip nhrp nhs x.x.x.x
ip nhrp registration timeout 20
ip tcp adjust-mss 1360
ip ospf message-digest-key 1 md5 7 xxx
ip ospf network broadcast
ip ospf hello-interval 4
ip ospf priority 0
ip ospf cost 180
tunnel source GigabitEthernet0/1
tunnel mode gre multipoint
tunnel key xxx
!
interface GigabitEthernet0/0
description ** e-VPN **
ip address x.x.x.x 255.255.255.0
ip pim sparse-mode
ip ospf message-digest-key 1 md5 7 xxx
ip ospf hello-interval 1
ip ospf priority 0
ip ospf cost 140
duplex auto
speed auto
!
interface GigabitEthernet0/1
description ** DMVPN **
ip address x.x.x.x 255.255.255.252
duplex auto
speed auto
!
interface Vlan22
description ** DATA VLAN **
ip address x.x.x.x 255.255.255.0
ip helper-address x.x.x.x
ip pim sparse-mode
no autostate
!
interface Vlan122
description ** VOICE VLAN **
ip address x.x.x.x 255.255.255.0
ip helper-address x.x.x.x
ip pim sparse-mode
no autostate
!
ip pim rp-address x.x.x.x |
