I have an ancient 2924-XL-EN switch
I have it setup wth 2 VLANS:
VLAN 10 which has servers and workstations. It includes various protocols, from SCS/LAT/DECNET for VMS boxes, as well as IP and Appletalk. Basically ports 1 to 19.
VLAN20 s basically a PPPoE zone between the WAN port of the router and 2 DSL modems (1 is backup). Basically ports 20 to 24.
Main workstation is a Mac which also acts as X display for VMS applications. For purpose of this discussion, it uses fa0/13 .
What is the best way to get the Mac to run Wireshark to analyse the traffic between the modem and the router in VLAN20 ?
Making the Mac switchport multi vlan 10,20 prevents the "port monitor" command for that port.
Is there a magic way to allow fa0/13 on VLAN 10 to get all packets flowing in VLAN 20 without allowing traffic from VLAN 10 to flow into VLAN 20 ?
(Moving the Mac to VLAN 20 would then cause conections to VLAN 10 machines to be severed).
Also, some various questions:
Is it correct that there can be only one management vlan at a time on a switch ?
The switch is configured to run NTP server. Is correct to assume that it can only serve port that are on the management vlan ? I would like the modems to be able to NTP sync, and the switch would be simplest.
(my current router doesn't have ability to have multiple interfaces on the WAN port, so it can't server a different IP subnet for the modems at the same time as having PPPoE interface).