On Tue, 2004-09-07 at 13:02, Brian Henning wrote: > That reminds me.. I think I read something about that a while ago but long > since forgot what or where.. Suppose I want to establish a bit of physical > redundancy between some switches by having more than one cable between them. > That this causes packet floods makes sense to me, the loop is obvious.. My > question is, what does one need to make that stop, and retain the > redundancy? > > Cheers, > ~Brian >
Really quickly... For Managed Cisco switches you build a special Port-channel and then add interfaces as needed to it.: ! On Switch 1 ! interface Port-channel10 switchport trunk encapsulation dot1q switchport mode trunk no ip address ! interface FastEthernet0/12 description Trunk to Switch 2 switchport trunk encapsulation dot1q switchport mode trunk no ip address duplex full speed 100 no cdp enable channel-group 10 mode desirable ! interface FastEthernet0/24 description Trunk to Switch 2 switchport trunk encapsulation dot1q switchport mode trunk no ip address duplex full speed 100 no cdp enable channel-group 10 mode desirable ! interface Vlan10 ip address 10.150.1.252 255.255.255.0 no ip redirects standby 10 ip 10.150.1.254 standby 10 timers 3 7 standby 10 priority 110 standby 10 preempt ! On Switch 2 ! interface Port-channel10 switchport trunk encapsulation dot1q switchport mode trunk no ip address ! interface FastEthernet0/12 description To Switch 1 switchport trunk encapsulation dot1q switchport mode trunk no ip address duplex full speed 100 no cdp enable channel-group 10 mode desirable ! interface FastEthernet0/24 description To Switch 1 switchport trunk encapsulation dot1q switchport mode trunk no ip address duplex full speed 100 no cdp enable channel-group 10 mode desirable ! interface Vlan10 ip address 10.150.1.253 255.255.255.0 no ip redirects standby 10 ip 10.150.1.254 standby 10 timers 3 7 standby 10 preempt === Not only do these switches have redundant port connections, but they are also set to take over for each other should one fail. :-) Jon -- TriLUG mailing list : http://www.trilug.org/mailman/listinfo/trilug TriLUG Organizational FAQ : http://trilug.org/faq/ TriLUG Member Services FAQ : http://members.trilug.org/services_faq/ TriLUG PGP Keyring : http://trilug.org/~chrish/trilug.asc
