Stuart,
There is a possibility that all links to a router can be a trunk but why do
you want to do that?. You would only need a trunk link to a switch if you
have multiple vlans and are using the router to route traffic between them.
A link would not be a trunk if is an access port in which the port belongs
to only one vlan. The port can't receive information form other vlan's
unless the information has been routed.
Secondly an Hybrid link is where the link is both a Trunk and Access link.
These carry both frames, with Tagged frames for Vlan information and
untagged frames without vlan information. Therefore it will receive both
Tagged and untagged frames.
To answer the third question. There is nothing much to consider except the
fact that to configure HSRP over an ISL link between vlans do the following
1. Define the encapsulation format which in your case will be ISL
2.Define the IP address and enable HSRP. However remember that you are
configuring this on the sub interfaces not the primary interface
i.e.
Interface fast Ethernet 1/1 .20
encapsulation isl 20.
The 20 in the first command is for the sub interface 20.
I hope this helps and is not misleading.
Tai
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of
Stuart Laubstein
Sent: 22 November 2000 10:15
To: [EMAIL PROTECTED]
Subject: Trunking--
I have to write my BCMSN tommorow and have managed to confuse myself about
trunking. Are the following points correct please.
1. Am i correct in that all links between switches and or routers can be
trunks if the hardware supports it? When would a link not be a trunk
2. Why would a trunk be an hybrid trunk-if it is directly connected wouldnt
it only receive tagged OR untagged frames and not both?
3. Is ther aynthing special to remember about configuring a trunk from HSRP
routers usning ISL?
thanks
stuart
p.s. any last minute suggestions for the BCMSN also gladly accepted
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