I have build topology like this:
host------c2950(f0/3)------(f0/4)c3550(f0/41)----modem-----Internet
I wanted to monitor c3560 port where modem is connected from host. So for that I configured rspan. configurate show below. But problem is that after configuration f0/4 of c3550 remains up and f0/3 of c2950 goes down. WHen I look at status of f0/4 it show "FastEthernet0/4 is up, line protocol is down (monitoring)". I tried to search websites It seems configuration is fine. Kindly help.
on c3550:
interface FastEthernet0/4
switchport trunk encapsulation dot1q
switchport mode trunk
switchport nonegotiate
interface FastEthernet0/41
switchport mode dynamic desirable
spanning-tree portfast
monitor session 2 destination interface Fa0/8
monitor session 2 source remote vlan 20
interface FastEthernet0/9
switchport mode access
spanning-tree portfast
spanning-tree guard loop
end
interface FastEthernet0/3
switchport mode trunk
switchport nonegotiate
spanning-tree guard loop
ip dhcp snooping trust
end
monitor session 1 source interface Fa0/41
monitor session 1 destination remote vlan 20 reflector-port Fa0/4
on c2950:
monitor session 2 destination interface Fa0/9
monitor session 2 source remote vlan 20
interface FastEthernet0/9
switchport mode access
spanning-tree portfast
spanning-tree guard loop
end
interface FastEthernet0/3
switchport mode trunk
switchport nonegotiate
spanning-tree guard loop
ip dhcp snooping trust
end
