[c-nsp] spanning-tree for local switching on ASR920

[Gert Doering]

Hi,

On Thu, Oct 19, 2017 at 06:05:47AM +0200, Peter Rathlev wrote:
> On Wed, 2017-10-18 at 15:39 +0200, Gert Doering wrote:
> > I have an ASR920 that is supposed to have gi0/0/10 and gi0/0/11 in
> > the same bridge group, with a routed IP:
> > 
> > interface GigabitEthernet0/0/10
> >  no ip address
> >  media-type auto-select
> >  negotiation auto
> >  cdp enable
> >  service instance 10 ethernet
> >   encapsulation untagged
> >   l2protocol peer stp
> >   bridge-domain 10
> >  !
> 
> We don't use STP on ASR920, but my guess is that you need "bridge-
> domain from-encapsulation" in the service instance configuration.

So where would untagged packets land, then?  "tag 10 -> bridge 10" I 
could understand, but this is just plain untagged...

> https://www.cisco.com/c/en/us/td/docs/routers/asr920/configuration/guide/lanswitch/lanswitch-xe-3s-asr920-book/lanswitch-xe-3s-asr920-book_chapter_0101.html#task_1000030
> 
> Then configure STP for VLAN "10". It doesn't seem like there is any way
> to map to an arbitrary PVST instance, VLAN ID and bridge domain ID has
> to match.

I need to test this :-) - though it feels... weird.

gert


-- 
USENET is *not* the non-clickable part of WWW!
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Gert Doering - Munich, Germany                             gert at greenie.muc.de
fax: +49-89-35655025                        gert at net.informatik.tu-muenchen.de
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