Monitoring and Analyzing Switch Operation

Traffic Mirroring

 

Maximum Supported Frame Size

 

The IPv4 encapsulation of mirrored traffic adds a 54-byte header to each

 

mirrored frame. If a resulting frame exceeds the MTU (Maximum Transmis-

 

sion Unit) allowed in the network, the frame is dropped.

 

 

N o t e

Mirroring does not truncate frames, and oversized mirroring frames will be

 

dropped.

 

If jumbo frames are enabled on the mirroring source switch, then the mirroring

 

destination switch and all downstream devices connecting the source switch

 

to the mirroring destination must be configured to support jumbo frames.

 

 

B-42