Span monitor session for VLAN 1

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Jun 15th, 2009
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We'd like to create a monitor session that covers all the traffic on a Catalyst 6513 switch. The only VLAN currently configured on the switch is the native VLAN 1, so I figured I could span the entire VLAN thus capture all traffic that traverses the switch. However, while the IOS allows me to create the session and enter VLAN 1 as the source VLAN, when I check the session it shows as having no source VLAN configured. Am I not allowed to span the switches native VLAN?

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Giuseppe Larosa Mon, 06/15/2009 - 10:56
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Hello Patrick,

just a warning even a powerful C6513 can be impaired if the traffic volume is much greater then the destination port speed: we have seen cpu to go as high as 100% on C6509 for a span session trying to push 3Gbps of traffic out a single GE port where the IDS is connected.

the following chapter from ios 12.2SXF can help

and the command reference for monitor session command

it is clearly stated that valid vlan-id is 1-4094 on C6500/7600.

Hope to help



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