Re: encapsulation failed? forus FALSE? sendself FALSE? Huh? from Hammer on 2009-07-08 (Ccielab archives 07/2009)

From: Hammer <bhmccie_at_gmail.com>
Date: Wed, 8 Jul 2009 14:40:27 -0500

This is getting entertaining. So, I pulled VLAN 824 from all trunks except
the ones directly between S2 and S4. The result is that VLAN 824 is not
being passed anywhere. However, I can now ping from S2 to S4. I Cannot ping
from S4 to S2. In the ICMP debug I am not even attempting the PING packet. I
am missing something very fundamental. This lab has been built a dozen times
in the IPExpert classes including by me when I attended. I think I'm going
to take up raising koi....

AcadLab3-Cat2(config-if-range)#do sho int trunk

Port Mode Encapsulation Status Native vlan
Fa0/21 on 802.1q trunking 1
Fa0/22 on 802.1q trunking 1
Fa0/23 on 802.1q trunking 1
Po23 on 802.1q trunking 1

Port Vlans allowed on trunk
Fa0/21 1-4094
Fa0/22 1-4094
Fa0/23 1-823,825-4094
Po23 1-823,825-4094

Port Vlans allowed and active in management domain
Fa0/21
1,7,40-41,50,60,70,80-81,86,90,100,110,120,200,300,812,824,841,843,847,857,862,864,2829
Fa0/22
1,7,40-41,50,60,70,80-81,86,90,100,110,120,200,300,812,824,841,843,847,857,862,864,2829
Fa0/23
1,7,40-41,50,60,70,80-81,86,90,100,110,120,200,300,812,841,843,847,857,862,864,2829
Po23
1,7,40-41,50,60,70,80-81,86,90,100,110,120,200,300,812,841,843,847,857,862,864,2829

Port Vlans in spanning tree forwarding state and not pruned
Fa0/21 none
Fa0/22 none
Fa0/23
1,7,40-41,50,60,70,80-81,86,90,100,110,120,200,300,812,841,843,847,857,862,864,2829
Po23 none
AcadLab3-Cat2(config-if-range)#
AcadLab3-Cat2(config-if-range)#do debug ip icmp
ICMP packet debugging is on
AcadLab3-Cat2(config-if-range)#
AcadLab3-Cat2(config-if-range)#do ping 4.8.24.4

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 4.8.24.4, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/4/9 ms
AcadLab3-Cat2(config-if-range)#
*Mar 1 02:19:54.018: ICMP: echo reply rcvd, src 4.8.24.4, dst 4.8.12.2
*Mar 1 02:19:54.026: ICMP: echo reply rcvd, src 4.8.24.4, dst 4.8.12.2
*Mar 1 02:19:54.026: ICMP: echo reply rcvd, src 4.8.24.4, dst 4.8.12.2
*Mar 1 02:19:54.035: ICMP: echo reply rcvd, src 4.8.24.4, dst 4.8.12.2
*Mar 1 02:19:54.035: ICMP: echo reply rcvd, src 4.8.24.4, dst 4.8.12.2
AcadLab3-Cat2(config-if-range)#

##########################################################################

AcadLab3-Cat4(config-if-range)#
AcadLab3-Cat4(config-if-range)#do sho int trunk

Port Mode Encapsulation Status Native vlan
Fa0/21 on 802.1q trunking 1
Fa0/22 on 802.1q trunking 1
Fa0/23 on 802.1q trunking 1
Po14 on 802.1q trunking 1

Port Vlans allowed on trunk
Fa0/21 1-2888,2890-4094
Fa0/22 1-2888,2890-4094
Fa0/23 1-823,825-2888,2890-4094
Po14 1-823,825-2888,2890-4094

Port Vlans allowed and active in management domain
Fa0/21
1,7,40-41,50,60,70,80-81,86,90,100,110,120,200,300,824,834,841,843,847,857,862,864,2829
Fa0/22
1,7,40-41,50,60,70,80-81,86,90,100,110,120,200,300,824,834,841,843,847,857,862,864,2829
Fa0/23
1,7,40-41,50,60,70,80-81,86,90,100,110,120,200,300,834,841,843,847,857,862,864,2829
Po14
1,7,40-41,50,60,70,80-81,86,90,100,110,120,200,300,834,841,843,847,857,862,864,2829

Port Mode Encapsulation Status Native vlan
Fa0/21 on 802.1q trunking 1
Fa0/22 on 802.1q trunking 1
Fa0/23 on 802.1q trunking 1
Po14 on 802.1q trunking 1

Port Vlans allowed on trunk
Fa0/21 1-2888,2890-4094
Fa0/22 1-2888,2890-4094
Fa0/23 1-823,825-2888,2890-4094
Po14 1-823,825-2888,2890-4094

Port Vlans in spanning tree forwarding state and not pruned
Fa0/21
1,7,40-41,50,60,70,80-81,86,90,100,110,120,200,300,824,834,841,843,847,857,862,864,2829
Fa0/22
1,7,40-41,50,60,70,80-81,86,90,100,110,120,200,300,824,834,841,843,847,857,862,864,2829
Fa0/23
1,7,40-41,50,60,70,80-81,86,90,100,110,120,200,300,834,841,843,847,857,862,864,2829
Po14 none
AcadLab3-Cat4(config-if-range)#
*Mar 1 02:19:22.200: ICMP: echo reply sent, src 4.8.24.4, dst 4.8.12.2
*Mar 1 02:19:22.208: ICMP: echo reply sent, src 4.8.24.4, dst 4.8.12.2
*Mar 1 02:19:22.208: ICMP: echo reply sent, src 4.8.24.4, dst 4.8.12.2
*Mar 1 02:19:22.208: ICMP: echo reply sent, src 4.8.24.4, dst 4.8.12.2
*Mar 1 02:19:22.208: ICMP: echo reply sent, src 4.8.24.4, dst 4.8.12.2
AcadLab3-Cat4(config-if-range)#

AcadLab3-Cat4(config-if-range)#
AcadLab3-Cat4(config-if-range)#do ping 4.8.24.2

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 4.8.24.2, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)
AcadLab3-Cat4(config-if-range)#

-Hammer

On Wed, Jul 8, 2009 at 2:20 PM, Bryan Bartik <bbartik_at_ipexpert.com> wrote:

> Is ARP getting through?
>
>
> On Wed, Jul 8, 2009 at 1:02 PM, Hammer <bhmccie_at_gmail.com> wrote:
>
>> Agreed. The debug implies the correct VLAN is getting flagged. And, What
>> I'm having trouble understanding is why changing the cost of the interface
>> (forcing STP down the opposite path) would allow the encapsulation to
>> function.
>>
>> Should I be looking for errdisable ports? I'm not seeing any.....
>>
>> *Mar 1 03:53:21.660: IP: tableid=0, s=4.8.24.2 (local), d=4.8.24.24
>> (Vlan824), routed via FIB
>> *Mar 1 03:53:21.660: IP: s=4.8.24.2 (local), d=4.8.24.24 (Vlan824), len
>> 100, sending
>> *Mar 1 03:53:21.660: IP: s=4.8.24.2 (local), d=4.8.24.24 (Vlan824), len
>> 100, output feature, Check hwidb(63), rtype 1, forus FALSE, sendself FALSE,
>> mtu 0
>> *Mar 1 03:53:21.660: IP: s=4.8.24.2 (local), d=4.8.24.24 (Vlan824), len
>> 100, encapsulation failed
>>
>

>
>>
>> -Hammer
>>
>>
>>
>> On Wed, Jul 8, 2009 at 1:51 PM, Darby Weaver <ccie.weaver_at_gmail.com>wrote:
>>
>>> If encapsulation is failing then ask yourself why it is not leaving
>>> (being encapsulated) the device correctly. Why is the packet not getting
>>> encapsulated in the correct vlan is a better way to put it.
>>>
>>>
>>>
>>>
>>>
>>>
>>> On Wed, Jul 8, 2009 at 2:31 PM, Hammer <bhmccie_at_gmail.com> wrote:
>>>
>>>> Sorry for the confusion Academy Lab 3 is IPExperts One Week Lab
>>>> Experience -
>>>> Lab 3
>>>>
>>>> This is what I'm seeing. I understand it's a L2 issue and I understand
>>>> what
>>>> is occuring and why. But I can't figure out how to fix the issue w/o
>>>> breaking up my VLANs into multiple MST instances or what. I jacked up
>>>> the
>>>> cost on the port channel to force the direct links to be used and I
>>>> thought
>>>> I was good to go. However, the lab specifically calls for ONE instance
>>>> of
>>>> spanning tree for all VLANs and I can't figure out how to force this to
>>>> work.
>>>>
>>>>
>>>> AcadLab3-Cat2(config-if)#
>>>> AcadLab3-Cat2(config-if)#do siib
>>>> Interface IP-Address OK? Method Status
>>>> Protocol
>>>> Vlan812 4.8.12.2 YES NVRAM up
>>>> up
>>>> Vlan824 4.8.24.2 YES NVRAM up
>>>> up
>>>> Vlan862 4.8.62.4 YES NVRAM up
>>>> up
>>>> Loopback0 12.12.12.12 YES NVRAM up
>>>> up
>>>> AcadLab3-Cat2(config-if)#
>>>> AcadLab3-Cat2(config-if)#do sho spanni
>>>>
>>>> MST0
>>>> Spanning tree enabled protocol mstp
>>>> Root ID Priority 32768
>>>> Address 0011.9368.a0d0
>>>> Cost 200000
>>>> Port 25 (FastEthernet0/23)
>>>> Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
>>>>
>>>> Bridge ID Priority 32768 (priority 32768 sys-id-ext 0)
>>>> Address 001b.d4c8.3d00
>>>> Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
>>>>
>>>> Interface Role Sts Cost Prio.Nbr Type
>>>> ------------------- ---- --- --------- --------
>>>> --------------------------------
>>>> Fa0/1 Desg FWD 200000 128.3 P2p
>>>> Fa0/6 Desg FWD 200000 128.8 P2p
>>>> Fa0/7 Desg FWD 200000 128.9 P2p
>>>> Fa0/9 Desg FWD 200000 128.11 P2p
>>>> Fa0/12 Desg FWD 2000000 128.14 Shr
>>>> Fa0/13 Desg FWD 2000000 128.15 Shr
>>>> Fa0/21 Altn BLK 200000 128.23 P2p
>>>> Fa0/22 Altn BLK 200000 128.24 P2p
>>>>
>>>> Interface Role Sts Cost Prio.Nbr Type
>>>> ------------------- ---- --- --------- --------
>>>> --------------------------------
>>>>
>>>> Fa0/23 Root FWD 200000 128.25 P2p
>>>> Fa0/24 Desg FWD 200000 128.26 P2p
>>>> Po23 Altn BLK 600000 128.232 P2p
>>>>
>>>>
>>>> AcadLab3-Cat2(config-if)#do sho int trunk
>>>>
>>>> Port Mode Encapsulation Status Native vlan
>>>> Fa0/21 on 802.1q trunking 1
>>>> Fa0/22 on 802.1q trunking 1
>>>> Fa0/23 on 802.1q trunking 1
>>>> Po23 on 802.1q trunking 1
>>>>
>>>> Port Vlans allowed on trunk
>>>> Fa0/21 1-4094
>>>> Fa0/22 1-4094
>>>> Fa0/23 1-4094
>>>> Po23 1-4094
>>>>
>>>> Port Vlans allowed and active in management domain
>>>> Fa0/21
>>>>
>>>> 1,7,40-41,50,60,70,80-81,86,90,100,110,120,200,300,812,824,841,843,847,857,862,864,2829
>>>> Fa0/22
>>>>
>>>> 1,7,40-41,50,60,70,80-81,86,90,100,110,120,200,300,812,824,841,843,847,857,862,864,2829
>>>> Fa0/23
>>>>
>>>> 1,7,40-41,50,60,70,80-81,86,90,100,110,120,200,300,812,824,841,843,847,857,862,864,2829
>>>> Po23
>>>>
>>>> 1,7,40-41,50,60,70,80-81,86,90,100,110,120,200,300,812,824,841,843,847,857,862,864,2829
>>>>
>>>> Port Vlans in spanning tree forwarding state and not pruned
>>>> Fa0/21 none
>>>> Fa0/22 none
>>>> Fa0/23
>>>>
>>>> 1,7,40-41,50,60,70,80-81,86,90,100,110,120,200,300,812,824,841,843,847,857,862,864,2829
>>>> Po23 none
>>>> AcadLab3-Cat2(config-if)#
>>>>
>>>>
>>>> ##########################################################################################################
>>>>
>>>>
>>>>
>>>> AcadLab3-Cat4(config)#do siib
>>>> Interface IP-Address OK? Method Status
>>>> Protocol
>>>> Vlan824 4.8.24.4 YES NVRAM up
>>>> up
>>>> Vlan834 4.8.34.4 YES NVRAM up
>>>> up
>>>> Vlan847 4.8.47.4 YES NVRAM up
>>>> up
>>>> Vlan864 4.8.64.4 YES NVRAM up
>>>> up
>>>> Loopback0 14.14.14.14 YES NVRAM up
>>>> up
>>>> AcadLab3-Cat4(config)#
>>>> AcadLab3-Cat4(config)#
>>>> AcadLab3-Cat4(config)#do sho spannin
>>>>
>>>> MST0
>>>> Spanning tree enabled protocol mstp
>>>> Root ID Priority 32768
>>>> Address 0011.9368.a0d0
>>>> Cost 200000
>>>> Port 25 (FastEthernet0/23)
>>>> Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
>>>>
>>>> Bridge ID Priority 32768 (priority 32768 sys-id-ext 0)
>>>> Address 0019.2f02.ee80
>>>> Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
>>>>
>>>> Interface Role Sts Cost Prio.Nbr Type
>>>> ------------------- ---- --- --------- --------
>>>> --------------------------------
>>>> Fa0/6 Desg FWD 200000 128.8 P2p
>>>> Fa0/7 Desg FWD 200000 128.9 P2p
>>>> Fa0/8 Desg FWD 200000 128.10 P2p
>>>> Fa0/9 Desg FWD 200000 128.11 P2p
>>>> Fa0/21 Desg FWD 200000 128.23 P2p
>>>> Fa0/22 Desg FWD 200000 128.24 P2p
>>>> Fa0/23 Root FWD 200000 128.25 P2p
>>>> Fa0/24 Desg FWD 200000 128.26 P2p
>>>> Po14 Altn BLK 600000 128.160 P2p
>>>>
>>>>
>>>> AcadLab3-Cat4(config)#
>>>> AcadLab3-Cat4(config)#
>>>> AcadLab3-Cat4(config)#do sho int trunk
>>>>
>>>> Port Mode Encapsulation Status Native vlan
>>>> Fa0/21 on 802.1q trunking 1
>>>> Fa0/22 on 802.1q trunking 1
>>>> Fa0/23 on 802.1q trunking 1
>>>> Po14 on 802.1q trunking 1
>>>>
>>>> Port Vlans allowed on trunk
>>>> Fa0/21 1-2888,2890-4094
>>>> Fa0/22 1-2888,2890-4094
>>>> Fa0/23 1-2888,2890-4094
>>>> Po14 1-2888,2890-4094
>>>>
>>>> Port Vlans allowed and active in management domain
>>>> Fa0/21
>>>>
>>>> 1,7,40-41,50,60,70,80-81,86,90,100,110,120,200,300,824,834,841,843,847,857,862,864,2829
>>>> Fa0/22
>>>>
>>>> 1,7,40-41,50,60,70,80-81,86,90,100,110,120,200,300,824,834,841,843,847,857,862,864,2829
>>>> Fa0/23
>>>>
>>>> 1,7,40-41,50,60,70,80-81,86,90,100,110,120,200,300,824,834,841,843,847,857,862,864,2829
>>>> Po14
>>>>
>>>> 1,7,40-41,50,60,70,80-81,86,90,100,110,120,200,300,824,834,841,843,847,857,862,864,2829
>>>>
>>>> Port Vlans in spanning tree forwarding state and not pruned
>>>> Fa0/21
>>>>
>>>> 1,7,40-41,50,60,70,80-81,86,90,100,110,120,200,300,824,834,841,843,847,857,862,864,2829
>>>> Fa0/22
>>>>
>>>> 1,7,40-41,50,60,70,80-81,86,90,100,110,120,200,300,824,834,841,843,847,857,862,864,2829
>>>> Fa0/23
>>>>
>>>> 1,7,40-41,50,60,70,80-81,86,90,100,110,120,200,300,824,834,841,843,847,857,862,864,2829
>>>> Po14 none
>>>> AcadLab3-Cat4(config)#
>>>>
>>>>
>>>>
>>>> #######################################################################################################
>>>>
>>>>
>>>>
>>>> AcadLab3-Cat1(config)#
>>>> AcadLab3-Cat1(config)#
>>>> AcadLab3-Cat1(config)#do siib
>>>> Interface IP-Address OK? Method Status
>>>> Protocol
>>>> Vlan812 4.8.12.1 YES NVRAM up
>>>> up
>>>> Vlan813 4.8.13.1 YES NVRAM up
>>>> up
>>>> Vlan841 4.8.41.1 YES NVRAM up
>>>> up
>>>> Loopback0 11.11.11.11 YES NVRAM up
>>>> up
>>>> AcadLab3-Cat1(config)#
>>>> AcadLab3-Cat1(config)#
>>>> AcadLab3-Cat1(config)#do sho spannin
>>>>
>>>> MST0
>>>> Spanning tree enabled protocol mstp
>>>> Root ID Priority 32768
>>>> Address 0011.9368.a0d0
>>>> Cost 200000
>>>> Port 21 (FastEthernet0/21)
>>>> Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
>>>>
>>>> Bridge ID Priority 32768 (priority 32768 sys-id-ext 0)
>>>> Address 0012.01b0.f100
>>>> Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
>>>>
>>>> Interface Role Sts Cost Prio.Nbr Type
>>>> ------------------- ---- --- --------- --------
>>>> --------------------------------
>>>> Fa0/1 Desg FWD 200000 128.1 P2p
>>>> Fa0/2 Desg FWD 200000 128.2 P2p
>>>> Fa0/4 Desg FWD 200000 128.4 P2p
>>>> Fa0/5 Desg FWD 200000 128.5 P2p
>>>> Fa0/11 Desg FWD 2000000 128.11 Shr
>>>> Fa0/21 Root FWD 200000 128.21 P2p
>>>> Fa0/22 Altn BLK 200000 128.22 P2p
>>>> Fa0/23 Desg FWD 200000 128.23 P2p
>>>>
>>>> Interface Role Sts Cost Prio.Nbr Type
>>>> ------------------- ---- --- --------- --------
>>>> --------------------------------
>>>>
>>>> Fa0/24 Desg FWD 200000 128.24 P2p
>>>> Po14 Desg FWD 600000 128.65 P2p
>>>>
>>>> AcadLab3-Cat1(config)#
>>>> AcadLab3-Cat1(config)#
>>>> AcadLab3-Cat1(config)#
>>>> AcadLab3-Cat1(config)#do sho int tu
>>>> sho int tu
>>>> % Incomplete command.
>>>>
>>>> AcadLab3-Cat1(config)#do sho int tru
>>>>
>>>> Port Mode Encapsulation Status Native vlan
>>>> Fa0/21 on 802.1q trunking 1
>>>> Fa0/22 on 802.1q trunking 1
>>>> Fa0/23 on 802.1q trunking 1
>>>> Po14 on 802.1q trunking 1
>>>>
>>>> Port Vlans allowed on trunk
>>>> Fa0/21 1-840,842-4094
>>>> Fa0/22 1-840,842-4094
>>>> Fa0/23 1-840,842-4094
>>>> Po14 1-840,842-4094
>>>>
>>>> Port Vlans allowed and active in management domain
>>>> Fa0/21
>>>>
>>>> 1,7,40-41,50,60,70,80-81,86,90,100,110,120,200,300,812-813,843,847,857,862,864,2829
>>>> Fa0/22
>>>>
>>>> 1,7,40-41,50,60,70,80-81,86,90,100,110,120,200,300,812-813,843,847,857,862,864,2829
>>>> Fa0/23
>>>>
>>>> 1,7,40-41,50,60,70,80-81,86,90,100,110,120,200,300,812-813,843,847,857,862,864,2829
>>>> Po14
>>>>
>>>> 1,7,40-41,50,60,70,80-81,86,90,100,110,120,200,300,812-813,843,847,857,862,864,2829
>>>>
>>>> Port Vlans in spanning tree forwarding state and not pruned
>>>> Fa0/21
>>>>
>>>> 1,7,40-41,50,60,70,80-81,86,90,100,110,120,200,300,812-813,843,847,857,862,864,2829
>>>> Fa0/22 none
>>>> Fa0/23
>>>>
>>>> 1,7,40-41,50,60,70,80-81,86,90,100,110,120,200,300,812-813,843,847,857,862,864,2829
>>>> Po14
>>>>
>>>> 1,7,40-41,50,60,70,80-81,86,90,100,110,120,200,300,812-813,843,847,857,862,864,2829
>>>> AcadLab3-Cat1(config)#
>>>> AcadLab3-Cat1(config)#
>>>> AcadLab3-Cat1(config)#
>>>>
>>>>
>>>>
>>>> -Hammer
>>>>
>>>>
>>>> On Wed, Jul 8, 2009 at 1:09 PM, Hammer <bhmccie_at_gmail.com> wrote:
>>>>
>>>> > Acadamy Lab 3. Good stuff.
>>>> >
>>>> > Give me a few minutes and I'll post relevant output.
>>>> >
>>>> > -Hammer
>>>> >
>>>> >
>>>> >
>>>> > On Wed, Jul 8, 2009 at 1:06 PM, Bryan Bartik <bbartik_at_ipexpert.com>
>>>> wrote:
>>>> >
>>>> >> What lab is this? Spanning-tree topology shouldn't matter since only
>>>> >> redundant paths are blocked. If there was a misconfiguration with
>>>> MST,
>>>> >> perhaps it could be an issue. Can you post relevant parts of the
>>>> configs
>>>> >> (SVIs, trunk ports, MST config), "sho interface trunk".
>>>> >>
>>>> >>
>>>> >> On Wed, Jul 8, 2009 at 11:42 AM, Hammer <bhmccie_at_gmail.com> wrote:
>>>> >>
>>>> >>> I'm using a proctorlabs rack. S1 is a 3550. Everything is using
>>>> SVIs.
>>>> >>>
>>>> >>> 3550 - 12.2.(44)
>>>> >>> and
>>>> >>> 3560s - 12.2.(25r)SEC
>>>> >>>
>>>> >>> The tasks of the lab require one instance of spanning tree (MST 0)
>>>> so all
>>>> >>> my
>>>> >>> vlans are going from S2 to S1. If I tamper with the cost of the
>>>> >>> interface, I
>>>> >>> can bring up the S2 to S4 leg but I kill the S2 to S1 leg. So I can
>>>> make
>>>> >>> it
>>>> >>> work but only by sacrificing another path.
>>>> >>>
>>>> >>> -Hammer
>>>> >>>
>>>> >>>
>>>> >>> On Wed, Jul 8, 2009 at 12:34 PM, Ryan West <rwest_at_zyedge.com>
>>>> wrote:
>>>> >>>
>>>> >>> > Hi,
>>>> >>> >
>>>> >>> > Do you have a 3550 in the mix with a physical interface that has
>>>> an IP
>>>> >>> > address assigned to it or is everything using SVIs? If that is
>>>> the
>>>> >>> case,
>>>> >>> > just move the address to an SVI. Verify your VLAN allow list and
>>>> check
>>>> >>> your
>>>> >>> > trunk links to make sure the VLAN you're trying to reach is
>>>> showing up
>>>> >>> in
>>>> >>> > the list.
>>>> >>> >
>>>> >>> > The first issue that I mentioned is detailed in this post:
>>>> >>> >
>>>> >>> >
>>>> >>> >
>>>> >>>
>>>> http://forum.internetworkexpert.com/ubbthreads.php/ubb/showflat/Number/14757/page/1#Post14757
>>>> >>> >
>>>> >>> > -ryan
>>>> >>> >
>>>> >>> > -----Original Message-----
>>>> >>> > From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On
>>>> Behalf
>>>> >>> Of
>>>> >>> > Hammer
>>>> >>> > Sent: Wednesday, July 08, 2009 1:15 PM
>>>> >>> > To: ccielab_at_groupstudy.com
>>>> >>> > Subject: encapsulation failed? forus FALSE? sendself FALSE? Huh?
>>>> >>> >
>>>> >>> > I am trying to bring up ip over a VLAN between two switches. It's
>>>> a
>>>> >>> typical
>>>> >>> > vendor lab with 4 switches and way too many connections.
>>>> >>> >
>>>> >>> > 1X = 1 wire trunking all vlans
>>>> >>> > 2X = 2 wires trunking all vlans
>>>> >>> > EC = EtherChannel trunking all vlans
>>>> >>> >
>>>> >>> > S1---------1x-----------S2
>>>> >>> > | \ / |
>>>> >>> > | \ / |
>>>> >>> > | \ / |
>>>> >>> > | \ / |
>>>> >>> > 2x EC EC 2x
>>>> >>> > | \ / |
>>>> >>> > | \ / |
>>>> >>> > | \ / |
>>>> >>> > | \ / |
>>>> >>> > | \ / |
>>>> >>> > | X |
>>>> >>> > | / \ |
>>>> >>> > | / \ |
>>>> >>> > | / \ |
>>>> >>> > | / \ |
>>>> >>> > | / \ |
>>>> >>> > | / \ |
>>>> >>> > | / \ |
>>>> >>> > | / \ |
>>>> >>> > | / \ |
>>>> >>> > S3-------1X-----------S4
>>>> >>> >
>>>> >>> > So I need OSPF in this little party but IP first. I can ping
>>>> east/west
>>>> >>> > (from
>>>> >>> > 1-2 and from 3-4) and I can ping north/south (from 1-3) but I
>>>> cannot
>>>> >>> ping
>>>> >>> > from 2-4. The vlan they need is active. The vlan interface is
>>>> up/up on
>>>> >>> each
>>>> >>> > of the switches. But I can't reach the other side of the VLAN. So
>>>> first
>>>> >>> I
>>>> >>> > see that spanning tree is preferring my EC links. No problem. Jack
>>>> up
>>>> >>> the
>>>> >>> > cost to oblivion and move on. Nope. Still no love. On a debug ip
>>>> >>> packet, I
>>>> >>> > come up with the below:
>>>> >>> >
>>>> >>> > BLAH BLAH BLAH, routed via FIB
>>>> >>> > BLAH BLAH BLAH sending
>>>> >>> > BLAH BLAH BLAH output feature, Check hwidb(63), rtype 1, forus
>>>> FALSE,
>>>> >>> > sendself FALSE, mtu 0
>>>> >>> > BLAH BLAH BLAH encapsulation failed
>>>> >>> >
>>>> >>> > I only found two links on google and none for cco for the forus
>>>> FALSE
>>>> >>> > sendself FALSE. Both links were questions with no answers. Has
>>>> anyone
>>>> >>> seen
>>>> >>> > this before? Is this part of my encapsulation failure? Or am I
>>>> barking
>>>> >>> up
>>>> >>> > the wrong tree? My logic was that if I was dealing with a spanning
>>>> tree
>>>> >>> > issue the traffic would still exit the switch....
>>>> >>> >
>>>> >>> > Help?
>>>> >>> >
>>>> >>> >
>>>> >>> >
>>>> >>> > -Hammer
>>>> >>> >
>>>> >>> >
>>>> >>> > Blogs and organic groups at http://www.ccie.net
>>>> >>> >
>>>> >>> >
>>>> _______________________________________________________________________
>>>> >>> > Subscription information may be found at:
>>>> >>> > http://www.groupstudy.com/list/CCIELab.html
>>>> >>>
>>>> >>>
>>>> >>> Blogs and organic groups at http://www.ccie.net
>>>> >>>
>>>> >>>
>>>> _______________________________________________________________________
>>>> >>> Subscription information may be found at:
>>>> >>> http://www.groupstudy.com/list/CCIELab.html
>>>> >>>
>>>> >>>
>>>> >>>
>>>> >>>
>>>> >>>
>>>> >>>
>>>> >>>
>>>> >>>
>>>> >>
>>>> >>
>>>> >> --
>>>> >> Bryan Bartik
>>>> >> CCIE #23707 (R&S), CCNP
>>>> >> Sr. Support Engineer - IPexpert, Inc.
>>>> >> URL: http://www.IPexpert.com <http://www.ipexpert.com/>
>>>>
>>>>
>>>> Blogs and organic groups at http://www.ccie.net
>>>>
>>>> _______________________________________________________________________
>>>> Subscription information may be found at:
>>>> http://www.groupstudy.com/list/CCIELab.html
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>
>>
>
>
> --
> Bryan Bartik
> CCIE #23707 (R&S), CCNP
> Sr. Support Engineer - IPexpert, Inc.
> URL: http://www.IPexpert.com

Blogs and organic groups at http://www.ccie.net
Received on Wed Jul 08 2009 - 14:40:27 ART

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