Re: Difference between administrative weight and autoroute

Thanks for your valuable input.

just of curiosity....

So what if i configure autoroute metric as 50 and total administrative
weight(we are configuring it on the physical interfaces) for the tunnel as
70 what will be the cost of the prefix beyond tailend. i am unable to
perform this scenario on my Laptop due to some issues. hope fully you can
direct me to the right direction

Sundeep

On Wed, Nov 2, 2011 at 11:19 AM, Paul Negron <negron.paul_at_gmail.com> wrote:

> Ahh!
>
> I understand now.
>
> I think the output below will help you.
>
> Here is a section from my Advanced MPLS class:
>
> R1#*Sh ip route ospf | sec 44.4.4.4
> *
> O 4.4.4.4 [110/128] via 0.0.0.0, 00:02:06, *Tunnel0
> * [110/128] via 0.0.0.0, 00:02:06, *Tunnel1
> *
> *The cost to the 4.4.4.4 network prefix is currently 128. Cost = (64)
> between R1 and R2 + (64) Cost between R2 and R4 + Loopback = 1 (64+63+1 =
> 128)
> **
> *R1(config)#*int tun 0
> *R1(config-if)#*tunnel mpls traffic-eng autoroute metric relative -5
> *
> R1#*Sh mpls traffic-eng autoroute*
>
> MPLS TE autorouting enabled
> destination 4.4.4.4 has 2 tunnels
> Tunnel0 (load balancing metric 66666666, nexthop 4.4.4.4, *relative
> metric -5*)
> Tunnel1 (load balancing metric 66666666, nexthop 4.4.4.4)
>
> R1#*Sh ip route 44.4.4.4
> *
> Routing entry for 44.4.4.4/32
> Known via "ospf 1", distance 110, metric 123, type intra area
> Routing Descriptor Blocks:
> * directly connected, via Tunnel0
> Route metric is *123*, traffic share count is 1
>
> *When the packet hits the end of the tunnel, 5 metric units are
> subtracted before counting each hop after. (64+63  5 = 123). In addition
> to the relative option, the absoute option will make the cost for*
*everything
> after the tunnel to be the same no matter how many hops it takes to reach
> the destination through the tunnel. This option only works when ISIS is
> used as the IGP.
> *
>
> SO you see, the Administrative weight is used for the cost on the Tunnel
> itself as a path as it relates to other tunnel paths. The autoroute metric
> is used for prefixes that are reachable through the tunnel.
>
> Make sense?
>
>
> Paul
>
> --
> Paul Negron
> CCIE# 14856 CCSI# 22752
> Senior Technical Instructor
>
>
>
>
> *From: *sundeep sadhwani <sundeep.sadhwani_at_gmail.com>
> *Date: *Wed, 2 Nov 2011 09:52:55 +0530
> *To: *Paul Negron <negron.paul_at_gmail.com>, Cisco certification <
> ccielab_at_groupstudy.com>
> *Subject: *Re: Difference between administrative weight and autoroute
> announce metric.
>
>
> *tunnel mpls traffic-eng autoroute metric
> *

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Received on Wed Nov 02 2011 - 22:11:20 ART