When running IOS version 15.2(2)T1 on a particular DMVPN spoke (Cisco 881W-GN-A-K9), I'm able to establish a connection to the DMVPN - NHRP works, EIGRP works - no issues.
When I tried upgrading to 15.2(4)M5, NHRP no longer connects to the hub from that spoke, but I can still ping the external IP gateway of the hub router just fine. The ISAKMP and IPSEC connection establish:
IPv4 Crypto ISAKMP SA
dst src state conn-id status
xxx.xxx.xxx.xxx xxx.xxx.xxx.xxx QM_IDLE 2004 ACTIVE
xxx.xxx.xxx.xxx xxx.xxx.xxx.xxx QM_IDLE 2003 ACTIVE
We are pleased to announce availability of Beta software for 16.6.3. 16.6.3 will be the second rebuild on the 16.6 release train targeted towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are looking for early feedback from custome...