Hi Experts ,
we configured etherchannel between 2960 swithes..we configured only one vlan i.e 11 on both the swithes and f0/47 is trunk port & native vlan is 11.
F0/47 is connected f0/0 of router which has subinterfaces like f0/0.11 , f0/0.12 etc...
the config look likes ,
switch :
interface Port-channel1
switchport trunk native vlan 11
switchport mode trunk
interface FastEthernet0/45
switchport trunk native vlan 11
switchport mode trunk
channel-group 1 mode on
!
interface FastEthernet0/46
switchport trunk native vlan 11
switchport mode trunk
channel-group 1 mode on
interface Vlan11
ip address 10.10.20.11 255.255.255.0
no ip route-cache
interface FastEthernet0/47
switchport trunk native vlan 11
switchport mode trunk
speed 100
duplex full
!
interface FastEthernet0/48
switchport trunk native vlan 11
switchport mode trunk
speed 100
duplex full
ip default-gateway 10.10.20.254
router config:
interface FastEthernet0/0
no ip address
duplex full
speed 100
!
interface FastEthernet0/0.11
encapsulation dot1Q 11 native
ip address 10.10.20.2 255.255.255.0
no snmp trap link-status
standby 1 ip 10.10.20.254
standby 1 priority 105
standby 1 preempt
standby 1 track Serial0/0/0:0
!
hsrp is configured between routers.
Today we faced a strange problem..Both the swithces are not reachable and vlan 11 on both switches is down where as f0/47 is up.
What caused vlan 11 to go down ? any idea...
later we erased startup config of both the switches to make the devices up.
Thanks,
Satish
