Well, I tried it my lab. switchport trunk allowed vlan has no impact on CDP, VTP, LACP, STP etc. They are still sent in vlan 1 even if it is not allowed on trunk.
http://www.cisco.com/en/US/docs/switches/lan/catalyst2940/software/release/12.1_19_ea1/configuration/guide/swvlan.html#wp1150302
On Mon, 2012-12-10 at 19:42 +0100, Andriy Bilous wrote:
> Seen the same with CDP on ISR G2 with 15.0M - they've sent CDP frames
> in every subinterface. It IS annoying.
I tried playing around a little and discovered that the neighbor will
see all the subinterfaces regardless of their encapsulation
Seen the same with CDP on ISR G2 with 15.0M - they've sent CDP frames in
every subinterface. It IS annoying.
Won't surprise me if that was an actual feature request to get something
obscure and ugly working in CiscoWorks or Prime. =)
On Mon, Dec 10, 2012 at 5:57 PM, Peter Rathlev wrote:
> On M
On 10/12/12 16:57, Peter Rathlev wrote:
On Mon, 2012-12-10 at 17:54 +0200, Saku Ytti wrote:
Luckily I think Cisco won't tag LLDP so maybe you can migrate there.
A Sup720 running SXI with subinterfaces will send LLDP frames in each
VLAN it seems, or at least that's what a neighboring 3560 seems
On Mon, 2012-12-10 at 17:54 +0200, Saku Ytti wrote:
> Luckily I think Cisco won't tag LLDP so maybe you can migrate there.
A Sup720 running SXI with subinterfaces will send LLDP frames in each
VLAN it seems, or at least that's what a neighboring 3560 seems to
think:
Switch1#show lldp nei
Capabi
> Cisco thinks - this is expected behavior.
I believe it's the expected behavior that the XR box won't accept an
arbitrary marked frame without any efp matching the designation
adam
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On 10/12/12 15:48, harbor235 wrote:
Aivars,
Best practice would be to remove VLAN 1 from the list of trunked VLANs.
Irrelevant. CDP still uses tag number "1", even if the vlan isn't on the
trunk.
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On (2012-12-10 17:39 +0200), Aivars wrote:
> vlan native on a trunk port, CDPs are sent with dot1q tag "1". vlan
> dot1q tag native will also do the same trick.
>
> What do you guys think? Is this a bug or a feature? Should it remain
> as it is?
I've always viewed it as bug. Luckily I th
On 10/12/12 15:39, Aivars wrote:
Hi,
I thought that CDP essence is to help understand what device you
have at the other end of the wire no matter what. You just plug one
Well... not really. For starters, if you have a non-CDP-aware layer2
device between 3 or more cisco devices, the w
Aivars,
Best practice would be to remove VLAN 1 from the list of trunked VLANs.
Mike
On Mon, Dec 10, 2012 at 10:39 AM, Aivars wrote:
> Hi,
>
> I thought that CDP essence is to help understand what device you
> have at the other end of the wire no matter what. You just plug one
> end
Hi,
I thought that CDP essence is to help understand what device you
have at the other end of the wire no matter what. You just plug one
end of the cable into one box and the other end into another and
you get your CDP neighbors. Besides other side usage like in IP
phone communication
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