All,
This will probably sound like a horrendous situation but unfortunately
networks are not always master-planned communities!
However, I have a Cisco router connected to a 2924 switch connected to a
Riverstone 8600
There are 2 100FX connections coming from the GSR to the 2924 and 2 10/100
(Cu) connection from the 2924 to the 8600 (yes, a loop)
The first connection is a routed connection with the GSR and the 8600 both
having L3 addresses on their respective ports ( .1 and .2 /30)
The second connection is a L2 tagged connection trunking VLANs 25 and 26.
When I set the 2924 for switchport mode multi it will move the VLANS but
raises hell since the MTU is off and there is packet loss.
To fix that scenario I use siwtchport mode trunk to get the right MTU. But
my problem is this..in trunk mode the defualt VLAN, VLAN 1 is automatically
included. I have tried to remove it (switchport mode trunk allowed-vlans
remove 1) but it does not remove. I can exclude the default VLAN on the
riverstone, but wiht the Cisco transporting it the RS freaks out since it
hears it's own MAC on two different ports. The RS had no problem when the
Cisco was in multi mode since the default VLAN was not transported
x.x.64.1/30 x.x.64.2/30
GSR 7/0 ----------------2924 ------------------ et.2.2 RS8600
7/1 ------ 25------ -----------25----- et.2.4
My question/problems:
Does anyone know if it is possible to have a trunk on a 2924 and not include
VLAN1 ?
Is my only other alternate to make the routed connection connect to access
ports on the 2924 and exclude that VLAN from the trunk on the tagged
connection?
Any ideas?
Thanks for you time and in advance for any help,
Jim
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