EtherChannel - Cat6509 and 2950

[JoyriderUK]

Folks, I'm trying to create a trunk to my 6509 switch. Its fine until I have both Gigabit ports plugged in. Then is goes pants. Anything I've overlooked?

2950
!
interface Port-channel1
switchport mode trunk
no ip address
!
!
interface GigabitEthernet0/1
switchport mode trunk
no ip address
channel-group 1 mode on
!
interface GigabitEthernet0/2
switchport mode trunk
no ip address
channel-group 1 mode on
!

set port channel 3/15-16 7
set spantree portfast 3/1-16 disable
set spantree guard none 3/1-16
set port channel 3/1-8,3/15-16 mode on

 

[kptn]

Hi Joyrider,

Please note that cisco 'trunk's allow two standards:
dot1q and the cisco propretary isl.
on the 6k5 try:
set trunk 3/15 on dot1q
on the 2950 try:
NativeIOS(config)#int gig 0/1
NativeIOS(config-if)#switchport trunk encap dot1q
NativeIOS(config-if)#switchport mode trunk

Which vlans do you intend to trunk?
Do the neighbor Port have the same native Vlan?
So long
kptn.m

 

[JoyriderUK]

Both sides are set to dot1q.. both have the same native VLAN too (1)

I'm not trunking multiple VLANs, I wish to load balance my uplinks from my 2950 into my 6509 for redundancy and throughput.


Any other thoughts?

 

[MJewell]

I have a 6509 trunking to a 4006 in a different building... here's what I have...

:6509
set port channel 4/1-2 156
set trunk 4/1 on dot1q 1-1005,1025-4094
set trunk 4/2 on dot1q 1-1005,1025-4094
set port channel 4/1-2 mode on

:4006
set port channel 1/1-2 88
!
#module 1 : 2-port 1000BaseX Supervisor
set port trap 1/1-2 enable
set trunk 1/1 on dot1q 1-1005,1025-4094
set trunk 1/2 on dot1q 1-1005,1025-4094
set spantree portfast 1/1-2 disable
set spantree guard none 1/1-2
set port channel 1/1-2 mode on

Hope this helps any...
-Mike