One of my client have strange issue. I have limited access to their infrastructure so couldnt investigate much on this. The have BE6000s server 2921 based ... only cucm cuc and imp server is  there. they have the issue of their phone that are already got registered and goes to registering status. Only 8841 phones having this issue. their 7945 phones not having any issue.    when i checked i found taht none of the phone shows active and standby server..   In this case what they normally does restart the whole esxi server.. actually no need to do. but still. then all 8841 phones gets register back. then again after one day or one week or 2 weeks this issue repeats.   8841 phones i can see upgrade failed status message.   i tried to access the server directly with laptop. all esxi , cucm, all are accessible.   is this routing issue? voice vlan issue? port where server connected issue without proper mode like access or vlan?   if this is routing issue then why all phones get connected while cucm or esxi got restarted? or esxi side vlan set up issue? port group vlan issue? what could be the reason?  i have very limited access to switches, cucm etc. no credential provided to me yet.  i requested for it.       ... View more

We have 2 wireless controllers( model : AIR-CT3504-K9) in HA. now its showing non redundant state as mentioned below: Can any body tell what could be be the reason? why maintenance cause says all ports are down. what does it means?   now secondary is in maintenance state.   Please help and how to resolve this issue       Redundancy Information Redundancy Mode.................................. SSO ENABLED Local State...................................... MAINTENANCE Peer State....................................... UNKNOWN - Communication Down Unit............................................. Secondary Unit ID.......................................... B0:90:7E:7F:38:00 Redundancy State................................. Non Redundant Mobility MAC..................................... B0:90:7E:7E:ED:80 Maintenance Mode................................. Enabled Maintenance cause................................ All ports are down Redundancy Management IP Address................. 172.20.26.4 Peer Redundancy Management IP Address............ 172.20.26.3 Redundancy Port IP Address....................... 169.254.26.4 Peer Redundancy Port IP Address.................. 169.254.26.3   Redundancy Information Redundancy Mode.................................. SSO ENABLED Local State...................................... ACTIVE Peer State....................................... UNKNOWN - Communication Down Unit............................................. Primary Unit ID.......................................... B0:90:7E:7E:ED:80 Redundancy State................................. Non Redundant Mobility MAC..................................... B0:90:7E:7E:ED:80 Redundancy Management IP Address................. 172.20.26.3 Peer Redundancy Management IP Address............ 172.20.26.4 Redundancy Port IP Address....................... 169.254.26.3 Peer Redundancy Port IP Address.................. 169.254.26.4 ... View more