I think you are mistaken, VTP didn't go over a router, it went over a bridge !! :-) If I replace the 8510 with another switch, it has the same effect.... ""Guest"" wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > yestoday,i setup a lab environment:using 8510,2924xl,3548xl and a pc as > sniffer. > 2924xl(0/24)----hub------(0/0/1)8510(0/0/0)--------3548xl > | > | > pc(sniffer) > > the first , i am using isl encapsulation in 2924 and 3548,vtp > domain:test, > 3548 is vtp server and 2924 is vtp client,disable the cdp > ********************************************** > 2924 > interface FastEthernet0/24 > description link to 8510 > switchport trunk encapsulation dot1q > switchport mode trunk > no cdp enable > > 3548 > interface FastEthernet0/48 > switchport trunk encapsulation dot1q > switchport mode trunk > > no cdp run > > in 8510,i just set up a simple bridge,nothing else: > interface FastEthernet0/0/0 > no ip address > no ip directed-broadcast > bridge-group 1 > ! > interface FastEthernet0/0/1 > no ip address > no ip directed-broadcast > bridge-group 1 > > bridge 1 protocol ieee > > > then a add a vlan in the 3548,ok,in 2924,i find the vlan i created in > 3548,the vtp is span to the 2924 > > the second ,I change 2924 and 3548's trunk encapsulation to dot1q,and > change both native to vlan 2 > the result is same. > > at last ,for 8510 does not support support bridging between supinterface > encap dot1q,i change the encap to isl ,and > i roll the sequence of bridging. > > > interface FastEthernet0/0/0.1 > encapsulation isl 1 > no ip redirects > no ip directed-broadcast > bridge-group 1 > ! > interface FastEthernet0/0/0.2 > encapsulation isl 2 > no ip redirects > no ip directed-broadcast > bridge-group 2 > > nterface FastEthernet0/0/1.1 > encapsulation isl 1 > no ip redirects > no ip directed-broadcast > bridge-group 2 > ! > interface FastEthernet0/0/1.2 > encapsulation isl 2 > no ip redirects > no ip directed-broadcast > bridge-group 1 > > out of my thought,the vtp can still span from the 3548 to 2924, > i check the packet captured by the sniffer,and find the reason, > the vtp is always send out from the vlan 1,is independ from the native > vlan, > and in the third lab,the 2924 received the vtp messages from vlan 2,it > also > can identify the vtp info. > > i don't know how to output the sniffer captured packet to txt > format,anyone who interest about > it can send you the packet ,or someone who knows the way can tell me > howto output txt format. > > thanks for everyone here Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=19157&t=18892 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
