03-03-2011 02:37 AM - edited 03-06-2019 03:52 PM
hi,
I need to collect sniffer trace from MPLS link. Since it's directly from ISP to router ethernet.I am planning to put a cisco 3750 in between ISP and Router.
Having cisco 3750 in place, can i configure bridge port to bypass MPLS traffic and mirror the port?
03-03-2011 03:05 AM
Hi,
Hope the below examples will help you.
This example shows how to create bridge group 10, to specify that the VLAN-bridge STP runs in the
bridge group, to define a port as a routed port, and to assign the port to the bridge group:
Switch(config)# bridge 10 protocol vlan-bridge
Switch(config)# interface gigabitethernet3/0/1
Switch(config-if)# no switchport
Switch(config-if)# no shutdown
Switch(config-if)# bridge-group 10
This example shows how to create bridge group 10 and to specify that the VLAN-bridge STP runs in the
bridge group. It defines a port as an SVI and assigns this port to VLAN 2 and to the bridge group:
Switch(config)# bridge 10 protocol vlan-bridge
Switch(config)# vlan 2
Switch(config-vlan)# exit
Switch(config)# interface vlan 2
Switch(config-if)# bridge-group 10
Switch(config-if)# no shutdown
Switch(config-if)# exit
Switch(config)# interface gigabitethernet2/0/2
Switch(config-if)# switchport mode access
Switch(config-if)# switchport access vlan 2
Switch(config-if)# no shutdown
Please rate the helpfull posts.
Regards,
Naidu.
03-03-2011 03:22 AM
Im pretty sure you could just do a normal access vlan switch ports
turn off unnecessary stuff like cdp , and put on bdpu filter so you dont see unnecessary traffic
eg...
Int gi x/x
description One end of mpls connnection
switchport
switchport mode access
switchport access vlan 500
spanning-tree portfast
spanning-tree bpdufilter enable
switchport nonegotiate
no cdp enable
Int gi x/x
description Other end of mpls connnection
switchport
switchport mode access
switchport access vlan 500
spanning-tree portfast
spanning-tree bpdufilter enable
switchport nonegotiate
no cdp enable
then do a span port on either port , doesnt matter which one
monitor session 1 source interface x
monitor session 1 destination interface x
destination interface , connect your laptop to this and run wireshark.
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