[c-nsp] 7600 Router Vlan / sub-interface question
Ram S
linux_guy_76 at yahoo.com
Fri May 6 00:36:30 EDT 2005
Is vlan mapping functionality available on
sub-interfaces ?
Thanks,
Ram.
--- Dave McGaugh <dmcgaugh at cac.washington.edu> wrote:
> I don't think enabling descending allocation will
> fix his problem
> (could be wrong). In my experience, regardless of
> the allocation
> method used on the box, when you create a VLAN
> sub-interface, it will
> internally use the same VLAN ID as that configured
> with the
> "encapsulation dot1q <vlan>" command.
>
> Additionally, it might be worth pointing out that in
> an earlier
> thread a few months back, having routed VLAN
> sub-interfaces are not
> supported on many protocols other than MPLS in the
> 7600.
>
> The VLAN mapping functionality is probably going to
> get closest to
> what he is looking for.
>
> -Dave
>
> On May 5, 2005, at 1:12 PM, Jeff Hood wrote:
>
> > Try this:
> > vlan internal allocation policy descending
> >
> > Only problem I think is that you have to reboot.
> We did that on our
> > 7609 Sup720 3bxl. Works great...
> >
> > Jeff Hood
> >
> >
> > On 5/5/05, Jared Mauch <jared at puck.nether.net>
> wrote:
> >
> >> On Thu, May 05, 2005 at 08:46:30PM +0100, Colin
> Whittaker wrote:
> >>
> >>>
> >>> Vlan ids are global to the chassis, so you can't
> do this.
> >>>
> >>
> >> well, except in the case of the OSMs,
> those are full L3
> >> linecards and vlans are specific to them, but
> yes, otherwise vlans
> >> are global.
> >>
> >> try typing "sh vlan internal"
> >>
> >> - jared
> >>
> >>>
> >>> Down side of it being a swouter.
> >>>
> >>> Colin
> >>>
> >>> On Thu, May 05, 2005 at 09:37:27PM +0200,
> Danielsen.Peter
> >>> Christian PED wrote:
> >>>
> >>>>> Any one, know if it's posible to add the same
> vlan id on to
> >>>>> diffred
> >>>>> sub interface, i get a error when trying,
> >>>>> My setup looks like this, one 7609 connectet
> to to Cisco 3550
> >>>>> switche,
> >>>>> alle running Layer3, i need to use the same
> vlan id on to or
> >>>>> more sub
> >>>>> interfaces, all sub interfaces are Layer3
> interfaces,
> >>>>>
> >>>>> My interface configuration on the 7609 is..
> >>>>> interface GigabitEthernet3/2
> >>>>> description 3550-S1
> >>>>> no ip address
> >>>>> no ip proxy-arp
> >>>>> spanning-tree portfast trunk
> >>>>> !
> >>>>> interface GigabitEthernet3/2.2
> >>>>> encapsulation dot1Q 2
> >>>>> ip vrf forwarding VRF00001
> >>>>> ip address 172.31.7.85 255.255.255.252
> >>>>> no ip proxy-arp
> >>>>> !
> >>>>> interface GigabitEthernet3/2.4
> >>>>> encapsulation dot1Q 4
> >>>>> ip vrf forwarding VRF0002
> >>>>> ip address 172.30.7.85 255.255.255.252
> >>>>> no ip proxy-arp
> >>>>> !
> >>>>> interface GigabitEthernet3/3
> >>>>> description 3550-S2
> >>>>> no ip address
> >>>>> no ip proxy-arp
> >>>>> spanning-tree portfast trunk
> >>>>> !
> >>>>> interface GigabitEthernet3/3.2
> >>>>> encapsulation dot1Q 2
> >>>>> ip vrf forwarding VRF00003
> >>>>> ip address 172.32.7.85 255.255.255.252
> >>>>> no ip proxy-arp
> >>>>>
> >>>>> If i try to add encapsulation dot1Q2 on
> sub-interface
> >>>>> GigabitEthernet3/3.2, i get the following
> error,
> >>>>> 7609(config-subif)#encapsulation dot1Q 2
> >>>>> Command rejected: VLAN 2 not available
> >>>>> 7609(config-subif)#
> >>>>>
> >>>>> Any one know how to get this to work !! ...
> >>>>>
> >>>>> /PED_DK
> >>>>>
> >>>>
> >>>>
> >>>>
> >>>>
> >>>>
>
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> >>>
> >>> --
> >>> Colin Whittaker colin.whittaker at heanet.ie
> Tel: +353 1 6609040
> >>> HEAnet NOC noc at heanet.ie
> iNOC-DBA: 1213*752
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> >>
> >> --
> >> Jared Mauch | pgp key available via finger from
>
> >> jared at puck.nether.net
> >> clue++; | http://puck.nether.net/~jared/ My
> statements are
> >> only mine.
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