From: Yasser Abdullah (yasser@alharbitelecom.com)
Date: Thu Apr 15 2004 - 12:18:03 GMT-3
Hi Tim,
Yes, a trunk qualifies as a physical port. I just tested this: Created
vlan 45 and SVC 45, the interface went up. Removed vlan 45 from the
trunk, svi went down.
Sw1(vlan)#vla 45
VLAN 45 added:
Name: VLAN0045
Sw1(vlan)#exi
APPLY completed.
Exiting....
Sw1#
Sw1(config-if)#inter vlan 45
Sw1# sh inter vlan 45
Vlan45 is up, line protocol is up
Sw1(config)#inter range fastEthernet 0/13 -15
Sw1(config-if-range)#sw trunk allowed vlan remove 45
Sw1(config-if-range)#^Z
Sw1#
Sw1#
Sw1#
11:34:57: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan45,
changed state to down
11:34:57: %SYS-5-CONFIG_I: Configured from console by console
Sw1#
HTH,
Yasser
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Tim Last
Sent: Thursday, April 15, 2004 5:55 PM
To: Group Study
Subject: 3550 - SVI's
Hi all,
According to the 3550 documentation,
http://www.cisco.com/univercd/cc/td/doc/product/lan/c3550/12119ea1/3550s
cg/swint.htm#1115763
an SVI doesn't become active until it is associated with a PHYSICAL
PORT.
Does a trunk qualify as a physical port?
Here's an example. Both SW1 & SW2 are runing RIP & both SVI's configured
as follows:
SW1 has int vlan 3, ip addr x.x.x.1/24 and Fa0/3 is in vlan 3
SW2 has int vlan 3, ip addr x.x.x.2/24 but no Fa ports are explicitly
assigned to vlan, however, the trunk allows vlan 3 traffic.
R3 has int E0, ip addr x.x.x.3/24
R3 e0 -----------Fa 0/3 SW1 ---trunk----- SW2
So, can R3 ping SW2's int vlan 3 ?
I can't try this with the equipment I have.
Thanks in advance. Any feedback is highly appreciated. Tim
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