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SPAN on Cisco router.

johnleeee
Beginner
Beginner

Hi all,

is it possible to configure port mirroring in Cisco router?

If no, how can I mirror traffic from one port to other?

Any idea?

BR

jl

6 Replies 6

fsebera
Enthusiast
Enthusiast

bridge the two interfaces

HTH

Frank

Hi Frank,

pls could you explain me closer

(or recomend any document)how to do that.

Is it possible to bridge more interfaces to one like in a switch and than plug to that interface monitoring station?

BR

jl

This is 1 option, there are several others available.

Remember to connect your traffic analyzer to one the interfaces on the router to capture your traffic

Also, you really do not need to trunk the interfaces "encapsulation dot1Q" but here just in case you need to interface with a Cisco switch.

Also additional "direct-to-the-point" help

http://www.netcraftsmen.net/welcher/papers/irb.htm

Regards

Frank

bridge irb

!

interface FastEthernet0.100

encapsulation dot1Q 100 Native

bridge-group 1

!

interface FastEthernet0.200

encapsulation dot1Q 200

bridge-group 1

!

interface BVI1

ip address 192.168.1.1 255.255.255.0

!

bridge 1 protocol ieee

Giuseppe Larosa
Hall of Fame Master Hall of Fame Master
Hall of Fame Master

Hello John,

SPAN is not available on routers so it is not an option.

There is a new packet capture feature.

see

http://www.cisco.com/en/US/prod/collateral/iosswrel/ps6537/ps6555/ps9913/datasheet_c78-502727.html

this can be possible or not on your router.

Hope to help

Giuseppe

Thanks Giuseppe,

we have 3600 series router so we cannot use this feature, but this feature is usable for me if decide to move to ISR series one.

BR

jl

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