From: Larry Letterman (lletterm@cisco.com)
Date: Mon May 09 2005 - 21:48:49 GMT-3
I dont think so , Mani...all our switches have two trunks, one to gw1 and one
to gw2.
The 35xx switches are all using switchport trunk with vlan allowed. if one
trunk fails the other
trunk becomes unblocked in stp and takes over. The same vlans are allowed on
both trunks, so I
dont see how it wont failover....
############################
Larry Letterman
Cisco Systems
############################
----- Original Message -----
From: mani poopal
To: Larry Letterman ; ccie2be ; ccielab@groupstudy.com
Sent: Monday, May 09, 2005 6:54 PM
Subject: Re: spanning-tree vlan 10 port-priority vs swithport allowed vlan
Hi Larry,
As Tim said, if the trunk configured with switch port allowed vlan and if
that trunk fails, there is no failover(to other trunk), but when you use
port-priority on the root switch(or cost on non root switch), there is an
effective failover. But when you have only one trunk, you can manipulate what
vlan's traverses across the trunk. I think at your place you have only one
trunk between the switches.
thanks
Mani
Larry Letterman <lletterm@cisco.com> wrote:
we use switcvhport vlan allowed inside cisco...in case you are
wondering..
############################
Larry Letterman
Cisco Systems
############################
----- Original Message -----
From: "mani poopal"
To: "ccie2be" ;
Sent: Monday, May 09, 2005 6:16 PM
Subject: RE: spanning-tree vlan 10 port-priority vs swithport allowed
vlan
> Hi Tim,
>
> Port priority is better switchport allowed vlan method. Just curious
what
method cisco likes, hopefully port priority method.
>
> As always thanks
>
> Mani
>
> ccie2be wrote:
> Mani,
>
> Come on, guy. I know you know which is better.
>
> Think about what happens if one of the links goes down with each
method.
>
> Tim
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
mani
> poopal
> Sent: Monday, May 09, 2005 6:44 PM
> To: ccielab@groupstudy.com
> Subject: spanning-tree vlan 10 port-priority vs swithport allowed vlan
>
> Hi Group,
> I have a question in tunking.
> -Asssume sw1 is connected to sw2 via fa 0/23 and fa 0/24 both isl
> trunking(not etherchannel)
> -There are vlan 10, 20 and 30 defined.
> -For all the vlan sw1 is the root
>
> If the task ask us to send the vlan 10 through fa 0/24 trunk(default it
will
> go through fa 0/23 trunk), what is the solutions. Please look at the
> following both solutions and give your thoughsts
>
> method1:
> sw1:
> int fa 0/24
> spannig-tree vlan 10 port-priority 96 (less than 128)
>
> mehod2:
> sw1/sw2
> int fa 0/24
> switchport trunk allowed vlan 10
> int fa 0/23
> switchport trunk allowed vlan 20,30
>
> guys what is the difference between both methods, according to my
knowledge,
> both accomplishes the same goal, any thoughts.
>
> thanks
>
> Mani
>
>
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