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3905 (CP3905.9-4-1SR3) to CUCM (14.0.1.13900-155) via DMVPN, phones registration constantly restarting when backhaul to site is via VDSL2 (NBN FTTN) but stable when via Cellular (Telstra). 3905 is connected via a Cisco IE-4010-16S12P but we are also ...
after a lot of troubleshooting and packet captures it was found that we needed to put "ip tcp adjust-mss 1300" on the interface within the vpnv4 as packets from these networks were too large for the backbone. Note applying the tcp adjust-mss to the b...
I have twice now had what sounds like the same issue, disabling CDP on the interface didn't fix and when I do a debug I don't see and CDP or DHCP data coming from into the interface from the phone, each time when I have replaced the phone with anothe...
