Re: AToM (EoMPLS) label stack

Yes. Tunnel label/IGP label/Transport label all refer same. These are all
for IGP prefixes and labels are given by LDP (statically also you can
configure).

On Tue, Feb 22, 2011 at 4:25 PM, GAURAV MADAN <gauravmadan1177_at_gmail.com>wrote:

> Is tunnel label same as transport label ?
>
>
> On Tue, Feb 22, 2011 at 4:01 PM, srinivas pv <vsrinivas.paturi_at_gmail.com>
> wrote:
> > Hi,
> >
> > AToM generally uses 2 label stack.
> >
> > Top label: Tunnel label (This label is same as the one in normal IGP
> setup.
> > Some times also called as IGP label) - This is used to carry packet to
> > remote PE. This label binding info you getit from 'show mpls ldp
> bindings'.
> >
> > Bottom label: VC label/PW label - This is to identify Attachment Circuit.
> > This you get it from 'show mpls l2 vc binding'. You can also check label
> > stack with 'show mpls l2 vc detail'.
> >
> > Thanks,
> > Srinivas
> >
> > On Tue, Feb 22, 2011 at 2:52 PM, GAURAV MADAN <gauravmadan1177_at_gmail.com
> >
> > wrote:
> >>
> >> Hi All
> >>
> >> Sorry for asking this question .. don't have a setup to try .. If
> >> someone could please clarify ..
> >>
> >> I am referring the AToM chapter in "MPLS config on Cisco IOS " book .
> >> I am referring to Ethernet as my L2 circuit (between PE and CE) .
> >>
> >> The confusion is :
> >>
> >> 1) "sh mpls forwarding-table" as well as data plane diagram for EoMPLS
> >> shows 2 labels . Outer will be MPLS label (used in MPLS core) and
> >> inner will be L2 circuit Label .
> >>
> >> 2) But when the book talks of "how AToM works" ; it talks of something
> >> like Tunnel Label and VC Label imposed by PE .
> >>
> >> Tunnel label : To propagate from PE-ingress to PE-egress
> >> VC Label : Used by PE-Egress to get where to send frame (out which
> >> interface) ::::: Just like your MPLS VPN label in L3....
> >>
> >> Now my query is regarding the label stack .. Can someone please tell
> >> me if its a 2 label stack or a 3 label stack .
> >> Can someone please tell me exact inner / outer labels .
> >>
> >> I will simulate this as soon as i have access to devices ,.... But if
> >> someone can answer ; it will be great .
> >>
> >> Thanks
> >> Gaurav Madan
> >>
> >>
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Received on Tue Feb 22 2011 - 17:11:20 ART