From: Ravi Singh (way2ccie@googlemail.com)
Date: Fri Jan 09 2009 - 11:15:15 ARST
I think , it is good to have it changed on all the switches in the domain,
since there can be STP changes in the topology and the path taken by the
traffic , thus will change, causing problems.
Ravi
On Fri, Jan 9, 2009 at 12:59 PM, CCIE To Be <ccie.tobe81@gmail.com> wrote:
> Would it not be an extra configuration to set MTU 1504 on all switches even
> if the traffic flow is not through above 2 switches ( SW1 & SW2 ) ?
>
> As discussed before we need to check the path of traffic as well. So this
> means we should consider the 'root' switch for the VLAN which is being use
> to double tag the customer's traffic ??
>
> If the root switch for those VLANs is different from SW3 & SW4 then we
> should change MTU on all switches OR can we say that it would be a best
> practice to change MTU on all switches despite of traffic flow ??
>
>
> Thanks
>
> On Fri, Jan 9, 2009 at 4:07 PM, Scott Morris <
> smorris@internetworkexpert.com
> > wrote:
>
> > Well, let's look at it a different way.... As you follow the path
> through
> > your network, IF you were to send out a packet with 1504 bytes, would it
> > cause a problem on any of the "middle" switches?
> >
> > If the answer is yes (which it likely is) then yes, everyone should be
> > aware
> > of that.
> >
> > ;) Follow the frame/packet.
> >
> >
> >
> >
> > -----Original Message-----
> > From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> > CCIE
> > To Be
> > Sent: Friday, January 09, 2009 6:37 AM
> > To: Cisco certification
> > Subject: MTU for dot1q-tunnel
> >
> > Dear Group,
> >
> > Below is the topology,
> >
> > SW1-------------------SW2
> > | |
> > | |
> > R1-----SW3------------------SW4--------R2
> >
> > Trunks are configured among all switches and R1 & R2 are customer's
> > routers.
> > We need to configure dot1q-tunnel on SW3 and SW4 to transparently pass
> the
> > traffic bewteen R1 & R2. My question is that should we need to increase
> mtu
> > only on SW3 & SW4 or we should change mtu to 1504 on all switches ??
> >
> >
> > HTH
> >
> >
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