- Bronze, 100 points or more
Hi every body.
I have few questions ;
1) Let say we have isl trunk between two switches:
sw1 has host1 in vlan 2 and sw2 has host2 in vlan2.
host2 sends a frame to hosts2.
sw1 receives the frame and encapsulates that frame in isl.
sw1 will use 40 bit multicast address 01:00:0c:00:00 0r 03:00:0c:00:00
1)what source address is used in source address field of isl? will it be the address associated with port acting as a trunk?
trunk is isl.
sw1 is vtp server, sw2 is vtp client.
Let say sw1 wants to send vtp message to sw2.
Will this message be encapsulated by ethernet frame, which in turn is encapsulated by isl? or vtp message will be encapsulated by only isl?
thanks and have a nice weekend
>> But what about source address in ethernet header? what will it be set to?
as Reza has noted the only reasonable source MAC address is that associated to the switch port and it can appear both in ISL and inner ethernet headers.
To be noted an ISL frame is not an ethernet frame and carries one ethernet in its payload.
Hope to help
1-It uses the Mac address of the switch port that sends the frame
2-The VTP message is send using ISL
Here is nore info: