SPAN RSPAN

Answered Question
Sep 7th, 2007
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Hi,


This is the scenario:

2 3560 switches both are populated with IP phones. There is a specific Voice VLAN. The monitoring port is on switch1


It looks like you can not configure SPAN and RSPAN on the same switch using the same destination port.


So I can moonitor voice traffic on switch1 using SPAN or on switch2 using RSPAN.


Is there no way I can monitor both switches here?


Anyone has experience with this?


Thanks,


Jan



Correct Answer by deepak.pandey about 9 years 6 months ago

Here the configuration for a switch which is connected to the network monitoring device.

!Define the RSPAN VLAN Let's say vlan 100

vlan 100

remote-span

! Monitor session 1 captures bidirectional traffic from source vlan's to RSPAN VLAN 100.

! let's say we want to monitor traffic for multiple vlan which span over multiple switches in this example our source vlans are vlan 2 to vlan 20.


monitor session 1 source vlan 2 - 20

monitor session 1 destination remote vlan 100


! Monitor session 2 captures bidirectional traffic from RSPAN VLAN 100 to interface conected to network monitoring device say fa4/29

monitor session 2 source remote vlan 100

monitor session 2 destination interface fa4/29


On other switches do the following configuration

!Define the RSPAN VLAN Let's say vlan 100

vlan 100

remote-span

! Monitor session 1 captures bidirectional traffic from source vlans to RSPAN VLAN 100


monitor session 1 source vlan 2 - 20

monitor session 1 destination remote vlan 100


hope this will help

Regards

Deepak Pandey

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ankbhasi Fri, 09/07/2007 - 03:50
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  • Cisco Employee,

Hi Jan,


May be I did not understood your question well but configuring RSAPN you can monitor both switch 1 and switch 2 on a destination port which can be on switch 1 or switch 2.


HTH


Ankur



j.huizinga Fri, 09/07/2007 - 05:48
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How?

Could you give an example?


Thanks,


Jan

Correct Answer
deepak.pandey Sat, 09/08/2007 - 03:47
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Here the configuration for a switch which is connected to the network monitoring device.

!Define the RSPAN VLAN Let's say vlan 100

vlan 100

remote-span

! Monitor session 1 captures bidirectional traffic from source vlan's to RSPAN VLAN 100.

! let's say we want to monitor traffic for multiple vlan which span over multiple switches in this example our source vlans are vlan 2 to vlan 20.


monitor session 1 source vlan 2 - 20

monitor session 1 destination remote vlan 100


! Monitor session 2 captures bidirectional traffic from RSPAN VLAN 100 to interface conected to network monitoring device say fa4/29

monitor session 2 source remote vlan 100

monitor session 2 destination interface fa4/29


On other switches do the following configuration

!Define the RSPAN VLAN Let's say vlan 100

vlan 100

remote-span

! Monitor session 1 captures bidirectional traffic from source vlans to RSPAN VLAN 100


monitor session 1 source vlan 2 - 20

monitor session 1 destination remote vlan 100


hope this will help

Regards

Deepak Pandey

j.huizinga Sun, 09/09/2007 - 10:30
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  • Silver, 250 points or more

Yes this realy helps!


Thank you very much and 5 points for you!


Jan

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