My company use dmvpn point-to-multipoint to connect from HQ to banch office with OSPF.
We have to migrate new ip plan for system because our DC is upgarding.
we config new tunnel for the brach router and HQ router as below.
And the brach router and HQ router
have current tunnel 1 with the same config ( except: ip and tunnel key).
when we active both tunel, some banch office is hard to establish through OSFP.
when we use: " show ip ospf nei" in HQ router we see: INT status for long time ( 10-> 30 minutes) before they change to FULL.
We try to use: clear ip ospf process or shut/no shut inter but It dont change for long time.
If we active only one tunnel, OSPF run well and change status: FULL very fast.
Could you tell me what happen?
thank you
HQ config
interface Tunnel2
description *Access WAN 2*
ip address 10.80.191.65 255.255.255.192
no ip redirects
ip nhrp authentication cisco
ip nhrp map multicast dynamic
ip nhrp network-id 2
ip nhrp holdtime 600
ip tcp adjust-mss 1400
ip ospf network point-to-multipoint
ip ospf priority 100
tunnel source ATM0/2/0
tunnel mode gre multipoint
tunnel key 2000
tunnel path-mtu-discovery
-------------------
banch config
interface Tunnel2
description *Access WAN 2*
ip address 10.80.191.70 255.255.255.192
no ip redirects
ip nhrp authentication cisco
ip nhrp map 10.80.191.65 172.19.2.53
ip nhrp map multicast 172.19.2.53
ip nhrp network-id 2
ip nhrp holdtime 600
ip nhrp nhs 10.80.191.65
ip tcp adjust-mss 1400
ip ospf network point-to-multipoint
ip ospf priority 0
tunnel source ATM0
tunnel mode gre multipoint
tunnel key 2000
tunnel path-mtu-discovery