RE : Encap Failed "Router on a Stick"

From: Bill.McKenzie@bisys.com
Date: Mon Sep 19 2005 - 08:19:39 GMT-3


I removed the native reference on both R6 and the SW1 and I was able to
ping to and from R6 now. Is this a version bug?
Making the native vlan 263 was actually the requirement and the
configuration I posted was the actual solution, which was demonstrated to
work.

Thanks everyone.

Bill

                                                                           
             Richard Dumoulin
             <Richard.Dumoulin
             @vanco.fr> To
                                       'Lee Donald'
             09/19/2005 07:12 <Lee.Donald@t-systems.co.uk>,
             AM Bill.McKenzie@bisys.com
                                                                        cc
                                       ccielab@groupstudy.com
                                                                   Subject
                                       RE : Encap Failed "Router on a
                                       Stick"
                                                                           
                                                                           
                                                                           
                                                                           
                                                                           
                                                                           

I agree. I believe Bruce Caslow mentioned this bug was due to an issue with
the interface controller not bein gable to handle the native vlan,

-- Richard

-----Message d'origine-----
De : Lee Donald [mailto:Lee.Donald@t-systems.co.uk]
Envoyi : lundi 19 septembre 2005 12:42
@ : Bill.McKenzie@bisys.com; Lee Donald
Cc : ccielab@groupstudy.com
Objet : RE: Encap Failed "Router on a Stick"

Bill,

I would remove the native function you currently have on. Frames in the
native vlan are not tagged and hence when they get sent across the trunk,
R6
doesn't know which vlan to forward them on.

Try that.

Regards

Lee.

-----Original Message-----
From: Bill.McKenzie@bisys.com [mailto:Bill.McKenzie@bisys.com]
Sent: 19 September 2005 11:32
To: Lee Donald
Cc: ccielab@groupstudy.com
Subject: RE: Encap Failed "Router on a Stick"

Yes, I guess that information might be helpful.

I'm ping from R2 (204.12.1.2) on the same ethernet segment to
R6(204.12.1.6) There is also BB3(204.12.1.254) on the same segment which I
can ping to just fine from R2. I can't ping to or from R6 unless I remove
the subinterfaces and put the IP address on the physical interface and just

make the switch port an access port in Vlan 263 (same as R2)

             Lee Donald
             <Lee.Donald@t-sys
             tems.co.uk> To
                                       Bill.McKenzie@bisys.com,
             09/19/2005 06:31 ccielab@groupstudy.com
             AM cc

                                                                   Subject
                                       RE: Encap Failed "Router on a
                                       Stick"

Bill,

Exactly where are you pinging to and from ?

Regards

Lee.

-----Original Message-----
From: Bill.McKenzie@bisys.com [mailto:Bill.McKenzie@bisys.com]
Sent: 19 September 2005 11:18
To: ccielab@groupstudy.com
Subject: Encap Failed "Router on a Stick"

I'm having some problems getting this configuration to work. I can't figure

out why on a debug ip packet detail, when I ping to or from this I get
encapsulation failed. When I delete the subinterfaces and assign the IP
address to the physical interface and put the switchport in vlan 263, it is

successful. After staring at my configuration for an hour , I can't see
anything wrong with it. Can someone verify this?

Switch1:
interface FastEthernet0/6
 switchport trunk encapsulation dot1q
 switchport trunk native vlan 263
 switchport mode trunk

R6:
interface Ethernet0/0
 no ip address
 half-duplex
!
interface Ethernet0/0.6
 encapsulation dot1Q 6
 ip address 163.1.6.6 255.255.255.0
 no cdp enable
!
interface Ethernet0/0.263
 encapsulation dot1Q 263 native
 ip address 204.12.1.6 255.255.255.0
 no cdp enable

Thanks in advance,
Bill



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