Re: MPLS TE Tunnel : Tunnel B/W doubt

Then what does "rsvp bandwidth <> " on interface does ?
That is also a constraint on interface to establish the tunnel .. right ?

How do you differentiate between the BW that we specify on interface level
and the one that we specify on interface tunnel ?

Thnx
Gaurav Madan

On Sat, Jan 28, 2012 at 9:23 PM, Paul Negron <negron.paul_at_gmail.com> wrote:

> The bandwidth is a constraint. It only says " I need 60K of bandwidth in
> order to establish this tunnel". One tunnel requires 60K and the other
> requires 70K. If the bandwidth is available for both, they will both be
> established. That "bandwidth" constraint has nothing to do with the cost of
> the tunnel for route selection.
> --
> Paul Negron
> CCIE# 14856 CCSI# 22752
> Senior Technical Instructor
>
>
>
> > From: GAURAV MADAN <gauravmadan1177_at_gmail.com>
> > Reply-To: GAURAV MADAN <gauravmadan1177_at_gmail.com>
> > Date: Sat, 28 Jan 2012 20:44:46 +0530
> > To: Cisco certification <ccielab_at_groupstudy.com>
> > Subject: MPLS TE Tunnel : Tunnel B/W doubt
> >
> > Hi All
> >
> > I am running in some issue to understand how Tunnel Bandwidth works .
> >
> > Topology
> > ---------
> >
> > R1 R4
> > | |
> > | |
> > R2-----------------R3
> >
> > R1 is head end of tunnel . It has 2 tunnels Tunnel0 and Tunnel 1 as
> follows
> > :
> >
> > R1#sh run int tun 0
> > Building configuration...
> >
> > Current configuration : 284 bytes
> > !
> > interface Tunnel0
> > ip unnumbered Loopback0
> > tunnel mode mpls traffic-eng
> > tunnel destination 4.4.4.4
> > tunnel mpls traffic-eng autoroute announce
> > tunnel mpls traffic-eng priority 7 7
> > tunnel mpls traffic-eng bandwidth 70
> > tunnel mpls traffic-eng path-option 1 dynamic lockdown
> > end
> >
> > R1#sh run int tun 1
> > Building configuration...
> >
> > Current configuration : 284 bytes
> > !
> > interface Tunnel1
> > ip unnumbered Loopback0
> > tunnel mode mpls traffic-eng
> > tunnel destination 4.4.4.4
> > tunnel mpls traffic-eng autoroute announce
> > tunnel mpls traffic-eng priority 7 7
> > tunnel mpls traffic-eng bandwidth 60
> > tunnel mpls traffic-eng path-option 1 dynamic lockdown
> >
> >
> >
> > Now ; one tunnel has bandwidth of 70Kbps and other has of 60Kbps .
> > Following is my show ip route ospf output :
> >
> > 4.0.0.0/32 is subnetted, 1 subnets
> > O 4.4.4.4 [110/4] via 4.4.4.4, 00:05:52, Tunnel1
> > [110/4] via 4.4.4.4, 00:05:52, Tunnel0
> >
> > I see both entries there ...
> >
> > Is there a reason for this ?
> > Please let me know .. I think that it should be routing via Tunnel 0
> only .
> >
> > Thanks
> > Gaurav Madan
> >
> >
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Received on Sat Jan 28 2012 - 23:37:16 ART