1 Dest-SPAN port: 6/33 - 100bTFull - VLAN100-dot1q trunk port
Attached Sniffer to 6/33
Host connected to the 6/42 and 6/43 sends 802.1/Q header to the CAT6509.
Want to verify that using SPAN feature ONLY not w/ HUB
Do not see VLAN header for VLAN99 but see other VLAN headers. I guess that is beacuse of source ports 6/42 and 6/43 are tunk ports and they might be getting frame/pkt from different VLAN ( other then 99) so it is seen.
SPAN dest port/s has to be in the different VLAN form the source SPA port that
you want to Sniff. For example: If you want to moirror source ports 6/42 and 6/43 (TRUNK) ports of VLAN 99 TO the SPAN dest (TRUNK) port 6/33, Then put the SPAN dest port 6/33 in VLAN=3 (or other then VLAN=99). This would let switch to pass the VLAN header info of source ports (VLAN=99) onto the SPAN dest port of (VLAN=3).
My understanding is...
If source and dest SPAN ports are in the same VLAN then CAT6509 does not pass the VLAN header onto the dest SPAN port because of host of same VLAN. eventhough all source and dest ports are TRUNK ports.
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