Re: CBTS MPLS-TE IOS-XR

Brian - thanks

in fact just as you confirmed my beliefs so I labbed the behaviour

where IOS requires the EXP bits matching on ingress & then an exp-bundle
tunnel interface as master declaring his member te tunnels vs IOX-XR where
we can use the following

RP/0/0/CPU0:XRv#sh run int tunnel-te0
Fri May 30 12:38:27.894 UTC
interface tunnel-te0
 ipv4 unnumbered Loopback0
 priority 0 0
 signalled-bandwidth 20000
 autoroute announce
 !
 destination 10.10.10.10
 policy-class default
 path-option 1 explicit identifier 1
!

RP/0/0/CPU0:XRv#sh run int tunnel-te1
Fri May 30 12:38:29.664 UTC
interface tunnel-te1
 ipv4 unnumbered Loopback0
 priority 0 0
 signalled-bandwidth sub-pool 20000
 autoroute announce
 !
 destination 20.20.20.20
 policy-class 5
 path-option 1 explicit identifier 2
!

so in XR the "policy-class" defines the EXP bit matching & running process
switched extended pings & checking

show mpls forwarding tunnels detail

then the bytes label switched corresponded to the correct tunnel interface
- awesome!

Brian - another thing sorry for the long post but im quite confused on
pre/post DS-TE implementations using RDM / MAM models

I understand the differences but I don't understand say IETF DS-TE has

  TE-Class Class-Type Priority 0 0 7 1 1 7 2 Unused Unused 3 Unused
Unused 4 0 0 5 1 0 6 Unused Unused 7 Unused Unused

what TE-class, class-type or priority refers to, for example does te-class
refer to EXP bits? then what is used for packet scheduling, I take it we
still need diffserv on the data-plane?

also in best practice design environments, would service providers use
pre/post IETF DS-TE or CBTS/PBST with DS-TE ?

Sorry for harping on, just confused

BR

Tony

On 30 May 2014 13:39, Brian McGahan <bmcgahan_at_ine.com> wrote:

> Right, this is called Policy Based Tunnel Selection:
> http://www.cisco.com/c/en/us/td/docs/ios_xr_sw/iosxr_r3-7/mpls/configuration/guide/gc37te.html#wp1325561
>
> What do you want to know about it specifically?
>
> Brian McGahan, 4 x CCIE #8593 (R&S/SP/SC/DC), CCDE #2013::13
> bmcgahan_at_INE.com
>
> Internetwork Expert, Inc.
> http://www.INE.com
>
>
> -----Original Message-----
> From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of
> Tony Singh
> Sent: Friday, May 30, 2014 6:59 AM
> To: Cisco certification
> Subject: Re: CBTS MPLS-TE IOS-XR
>
> The documentation on this subject is quite confusing for example what IOS
> calls CBTS XR calls PBTS for EXP bit matching/forwarding
>
> Brian / SP experts can you guide me pls
>
> --
> BR
>
> Tony
>
> > On 30 May 2014, at 12:51, Tony Singh <mothafungla_at_gmail.com> wrote:
> >
> >
> > Hi
> >
> > Anyone know how to configure a traffic engineering tunnel master on XR,
> so that I can deterministically label switch packets based on the EXP bits
> >
> > This configuration works fine for me using IOS can't find any config
> guides for IOS-XR on the same topic it's driving me nuts!
> >
> > --
> > BR
> >
> > Tony
>
>
> Blogs and organic groups at http://www.ccie.net
>
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html

Blogs and organic groups at http://www.ccie.net
Received on Fri May 30 2014 - 13:52:35 ART