From: khurram noor (smartcapricon82@gmail.com)
Date: Sun Feb 15 2009 - 11:14:02 ARST
i am not clear, why is there a need for extra vlan?
On Sun, Feb 15, 2009 at 6:03 PM, Dan C <cdan2154@gmail.com> wrote:
> Hi ,
>
> Here is a working sample config.... you will need to add an extra vlan
> in this case vlan 100 and both switches trunk using dot1q
>
> Topology
>
> R1------ Sw1=======dot1q trunk======Sw2---------R2
>
> for both sw1 and sw2 system mtu 1504
>
> SW1 configs
>
>
> interface FastEthernet2/0/1
> switchport access vlan 100
> switchport mode dot1q-tunnel
> l2protocol-tunnel cdp
> no cdp enable
>
>
> SW2 configs
>
> interface FastEthernet1/0/2
> switchport access vlan 100
> switchport mode dot1q-tunnel
> l2protocol-tunnel cdp
> no cdp enable
>
> Verify:
>
> SW2#sh l2p
> SW2#sh l2protocol-tunnel
> COS for Encapsulated Packets: 5
> Drop Threshold for Encapsulated Packets: 0
>
> Port Protocol Shutdown Drop Encapsulation Decapsulation Drop
> Threshold Threshold Counter Counter Counter
> ---------- -------- --------- --------- ------------- -------------
> -------------
> Fa1/0/2 cdp ---- ---- 283 277
> 0
> --- ---- ---- ---- ----
> ----
> --- ---- ---- ---- ----
> ----
> --- ---- ---- ---- ----
> ----
> --- ---- ---- ---- ----
> ----
> --- ---- ---- ---- ----
> ----
>
> SW2#
>
> R2
> R2#sh cdp nei
> Capability Codes: R - Router, T - Trans Bridge, B - Source Route Bridge
> S - Switch, H - Host, I - IGMP, r - Repeater
>
> Device ID Local Intrfce Holdtme Capability Platform Port ID
> SW1 Fas 0/0 130 R S I WS-C3750- Fas
> 2/0/2
> R1 Fas 0/1 168 R 3640 Fas 0/0
> R3 Ser 0/1 137 R S 2651XM Ser 1/3
> R2#
>
>
> R1
> R1#sh cdp nei
> Capability Codes: R - Router, T - Trans Bridge, B - Source Route Bridge
> S - Switch, H - Host, I - IGMP, r - Repeater
>
> Device ID Local Intrfce Holdtme Capability Platform Port ID
> R2 Fas 0/0 161 R S 2651 Fas 0/1
> R3 Ser 0/1 178 R S 2651XM Ser 1/2
> R1_R5#
>
>
> As for documentation have a look at:
>
> http://www.cisco.com/en/US/docs/switches/lan/catalyst3560/software/release/12.2_25_se/configuration/guide/swtunnel.html
>
>
> HTH,
> Dan
>
> On Sun, Feb 15, 2009 at 11:34 PM, khurram noor
> <smartcapricon82@gmail.com> wrote:
> > Hello everyone,
> >
> > I have a question about l2 protocol tunneling. which i have incomplete
> > answer in ie solution.
> >
> > The task is.
> > *Configure SW2 so that SW3 and SW4 see each other as CDP neighbors across
> > the routed link that connects them*
> >
> > My understanding is as below.
> >
> >
> > - Disable CDP on the ports over SW2 which are connecting it to SW3 and
> > SW4 and enable l2protocol-tunnel cdp on same ports.
> >
> > Will that be enough for it to work or do i need to perform similar action
> on
> > port over SW3 and SW4 that are connected to SW2?
> > I am asking this question as this l2protocol tunneling does not work
> over
> > dynamips, so i cannot test.
> >
> > Kindly Help ! --
> > Khurram Noor
> > CCIP, CCNA
> >
> >
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> >
> >
> >
> >
>
-- Khurram Noor CCIP, CCNABlogs and organic groups at http://www.ccie.net
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