Thanks in advance to anyone who can help. I have a bunch of 3548XL (I know they are old and EOL) so I'm in the process of changing their VTP mode from client to transparent, the VTP server is our core 6500 router and all 3548XL closet switches are VTP clients, Vlans are manually prunned at both ends of the trunks...I have issues with 2 out of the 14 3548XL switches that I performed the VTP mode change on, there is no difference between them -same code, same hardware, same configuration but every time I change the VTP mode to transparent users begin experiencing intermittent network access, I loose connectivity to the switch via telnet, there is connectivity for a few seconds then connectivity is lost...has anyone experienced something similar?
Is VTP pruning disabled on the 6500?
It's a fact that pruning has issues when there are transparent switches meaning that the VLANs can get prunned the wrong way. What do you mean with "Vlans are manually prunned at both ends of the trunks", is this using switchport trunk allowed vlan X or switchport trunk pruning vlan X ?