Re: l2 tunnel

Captain obvious didn't check the URL http://www.cisco.com/en/US/docs/ios/*
lanswitch*/configuration/guide/lsw_ieee_802.1q.html<http://www.cisco.com/en/U
S/docs/ios/lanswitch/configuration/guide/lsw_ieee_802.1q.html>

If you read the document you would also see this:

The Q-in-Q VLAN tag termination feature is simpler than the IEEE 802.1Q
tunneling feature deployed for the Catalyst 6500 series switches or the
Catalyst 3550 and Catalyst 3750 switches. Whereas switches require IEEE
802.1Q tunnels on interfaces to carry double-tagged traffic, routers need
only encapsulate Q-in-Q VLAN tags within another level of 802.1Q tags in
order for the packets to arrive at the correct destination.

Along with pretty pictures of both L3 and L2/L3 switches.

I am not writing to show tech dominance or waste time for ungreatfuls
talking down for not doing their own research. Good luck in your studies.
Hope you start to figure out urls before you sit.

On Tue, Feb 21, 2012 at 7:14 PM, Aaron <aaron1_at_gvtc.com> wrote:

Thanks Marc, that link seems to be more for the router platform then the
> 3750/4500 switch type platform. I could be mistaken.****
>
> ** **
>
> I did find something tonight that seems to lead me to believe that
> switchport mode dot1qtunnel is for adding a second tag onto rcvd (or
> poping xmitted) frames.and that the l2protocol-tunnel command is for
> causing cdp/stp/vtp to be tunneled along with that or not along with
> pushing a second tag right there at the interface. So I gather that I
> dont have to use l2protocol-tunnel with switchport mode dot1qtunnel.***
> *
>
> ** **
>
> Aaron****
>
> ** **
>
> *From:* marc edwards [mailto:renorider_at_gmail.com]
> *Sent:* Tuesday, February 21, 2012 6:26 PM
> *To:* Aaron
> *Cc:* ccielab_at_groupstudy.com
> *Subject:* Re: l2 tunnel****
>
> ** **
>
> 12.3(7)T****
>
> This feature was introduced.****
>
>
>
>
http://www.cisco.com/en/US/docs/ios/lanswitch/configuration/guide/lsw_ieee_80
2.1q.html
> ****
>
> On Tue, Feb 21, 2012 at 3:09 PM, Aaron <aaron1_at_gvtc.com> wrote:****
>
> Also, I'm not seeing the "switchport mode dot1q-tunnel" command, but am
> seeing the l2protocol-tunnel command. Am I supposed to use both commands
> to
> accomplish the tunnel?...or can I accomplish the tunnel simply using the
> available command "l2protocol-tunnel" ?
>
>
> Switch>
> Switch>en
> Switch#conf t
> Enter configuration commands, one per line. End with CNTL/Z.
> Switch(config)#int g2/3
> Switch(config-if)#swi
> Switch(config-if)#switchport mo
> Switch(config-if)#switchport mode ?
> access Set trunking mode to ACCESS unconditionally
> dynamic Set trunking mode to dynamically negotiate access or trunk
> mode
> private-vlan Set the mode to private-vlan host or promiscuous
> trunk Set trunking mode to TRUNK unconditionally
>
> Switch(config-if)#l2
> Switch(config-if)#l2protocol-tunnel ?
> cdp Cisco Discovery Protocol
> drop-threshold Set drop threshold for protocol packets
> shutdown-threshold Set shutdown threshold for protocol packets
> stp Spanning Tree Protocol
> vtp Vlan Trunking Protocol
> <cr>
>
> Switch(config-if)#l2protocol-tunnel
> Switch(config-if)#sw mo
> Switch(config-if)#sw mode ?
> access Set trunking mode to ACCESS unconditionally
> dynamic Set trunking mode to dynamically negotiate access or trunk
> mode
> private-vlan Set the mode to private-vlan host or promiscuous
> trunk Set trunking mode to TRUNK unconditionally
>
> Switch(config-if)#
> Switch(config-if)#do sh run in g2/3
> Building configuration...
>
> Current configuration : 153 bytes
> !
> interface GigabitEthernet2/3
> l2protocol-tunnel cdp
> l2protocol-tunnel stp
> l2protocol-tunnel vtp
> no cdp enable
> spanning-tree bpdufilter enable
> end
>
> Switch(config-if)#no l2protocol-tunnel
> Switch(config-if)#do sh run in g2/3
> Building configuration...
>
> Current configuration : 36 bytes
> !
> interface GigabitEthernet2/3
> end
>
> Switch(config-if)#
> Switch(config-if)#
> Switch(config-if)#sw
> Switch(config-if)#l2
> Switch(config-if)#l2protocol-tunnel
> Switch(config-if)#do sh run in g2/3
> Building configuration...
>
> Current configuration : 153 bytes
> !
> interface GigabitEthernet2/3
> l2protocol-tunnel cdp
> l2protocol-tunnel stp
> l2protocol-tunnel vtp
> no cdp enable
> spanning-tree bpdufilter enable
> end
>
> Switch(config-if)#swi
> Switch(config-if)#switchport mo
> Switch(config-if)#switchport mode ?
> access Set trunking mode to ACCESS unconditionally
> dynamic Set trunking mode to dynamically negotiate access or trunk
> mode
> private-vlan Set the mode to private-vlan host or promiscuous
> trunk Set trunking mode to TRUNK unconditionally
>
> Switch(config-if)#do sh ver | in IOS
> IOS (tm) Catalyst 4000 L3 Switch Software (cat4000-I9S-M), Version
> 12.2(18)EW, EARLY DEPLOYMENT RELE
> Switch(config-if)#do sh ver | in 450
>
> cisco WS-C4503 (MPC8245) processor (revision 4) with 262144K bytes of
> memory.
> Switch(config-if)#
>
>
> Aaron****
>
>
>
> -----Original Message-----
> From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of
> Aaron
> Sent: Tuesday, February 21, 2012 4:21 PM
> To: ccielab_at_groupstudy.com
> Subject: l2 tunnel
>
> Is it possible to do layer 2 tunneling of everything, including cdp/stp/vtp
> on a 3750 (and 4500) interface for only a single vlan while also doing
> regular vlan processing of other vlans....on that same interface?
>
>
>
> example, on 3750 port g1/0/8, i currenly have single dot1q tags for vlan
> 242
> and 245, but i would also like to configure vlan 113 for complete tunneling
> of all traffic arriving on g1/0/8 for cdp/stp/vtp and of course regular
> data
> that is tagged with vlan 113.
>
>
>
> Can this be done on the gear mentioned?
>
>
>
> Aaron
>
>
> Blogs and organic groups at http://www.ccie.net
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>
>
>
>
> ****
>
> ** **

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Received on Tue Feb 21 2012 - 19:48:25 ART