Re: IS-IS issue over ethernet subinterface

Hi W.

bypassed the 2 3550s and IS-IS works fine.

R1 config:
interface Loopback0
 ip address 172.10.10.1 255.255.255.255
 ip router isis
!
interface FastEthernet0/0
 no ip address
 duplex half
!
interface FastEthernet0/0.12
 encapsulation dot1Q 12
 ip address 10.10.12.1 255.255.255.0
 ip router isis
!
router isis
 net 49.0001.0000.0000.0001.00
!
R1#sh clns neighbors

System Id Interface SNPA State Holdtime Type
Protocol
R2 Fa0/0.12 ca46.2c19.0000 Up 8 L1L2 IS-IS
R1#

R1#sh isis neighbors

System Id Type Interface IP Address State Holdtime Circuit Id
R2 L1 Fa0/0.12 10.10.12.2 UP 8
R2.01
R2 L2 Fa0/0.12 10.10.12.2 UP 9
R2.01
R1#

R1#sh cdp neighbors
Capability Codes: R - Router, T - Trans Bridge, B - Source Route Bridge
                  S - Switch, H - Host, I - IGMP, r - Repeater, P - Phone

Device ID Local Intrfce Holdtme Capability
Platform Port ID
R2 Fas 0/0 153 R 7206VXR
Fas 0/0
R1#

Does anyone know why this setup does work across the 3550s?

Dheven

On Wed, Apr 8, 2009 at 6:24 PM, Ernest Wambari <ewambari_at_gmail.com> wrote:

> ES-IS instead of IS-IS adjacencies form in most cases due to IS-IS hellos
> not being processed - either due to MTU mismatch somewhere along the link or
> invalid authentication.
>
> I would try and simplify my scenario by eliminating the switches between
> the two routers first and then work my way out to the full topology.
>
> Regards,
>
> W.
>
>
> On Wed, Apr 8, 2009 at 7:04 PM, Dheven <dheven_at_gmail.com> wrote:
>
>> Hi GS,
>>
>> After adding the isis network point-to-point get the clns adj.
>>
>> R1#sh clns neighbors
>>
>> System Id Interface SNPA State Holdtime Type
>> Protocol
>> 0000.0000.0002 Fa0/0.12 c20f.20fb.0000 Up 274 IS *
>> ES-IS*
>> R1#
>>
>> It is forming ES-IS instead of IS-IS
>>
>>
>> BUT still cannot get IS-IS to form adj.
>>
>> R1#sh isis neighbors
>>
>> System Id Type Interface IP Address State Holdtime Circuit Id
>> R1#
>>
>>
>> Regards
>>
>> Dheven
>>
>>
>>
>> On Wed, Apr 8, 2009 at 3:33 PM, Dheven <dheven_at_gmail.com> wrote:
>>
>>> Reza,
>>>
>>> Ran wireshark but not seeing strange. Can anyone simulate this issue? BTW
>>> im running Dynamips 3725 with ios
>>> c3725-adventerprisek9-mz.124-15.T5.bin
>>>
>>> Dheven
>>>
>>>
>>> On Wed, Apr 8, 2009 at 2:55 PM, Reza Toghraee <reza_at_toghraee.com> wrote:
>>>
>>>> As a debug method I suggest to turn the switch ports which are connected
>>>> to
>>>> the routers as a span input, and send it to a wireshark and check what's
>>>> going on,
>>>>
>>>>
>>>>
>>>> -----Original Message-----
>>>> From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of
>>>> Dheven
>>>> Sent: Wednesday, April 08, 2009 4:50 PM
>>>> To: Dishan Gamage
>>>> Cc: Ernest Wambari; ccielab_at_groupstudy.com
>>>> Subject: Re: IS-IS issue over ethernet subinterface
>>>>
>>>> Firstly I assume hardware issue... but its not. configured OSPF over the
>>>> link and adjacencies formed no issue.
>>>>
>>>> R1#
>>>> *Mar 1 00:18:22.567: %OSPF-5-ADJCHG: Process 1, Nbr 2.2.2.2 on
>>>> FastEthernet0/0.12 from LOADING to FULL, Loading Done
>>>> R1#
>>>>
>>>> R1#sh ip ospf neighbor
>>>>
>>>> Neighbor ID Pri State Dead Time Address
>>>> Interface
>>>> 2.2.2.2 1 FULL/DR 00:00:35 10.10.10.2
>>>> FastEthernet0/0.12
>>>> R1#
>>>>
>>>>
>>>>
>>>>
>>>> On Wed, Apr 8, 2009 at 2:45 PM, Dishan Gamage <dishanlg_at_gmail.com>
>>>> wrote:
>>>>
>>>> > seems that its sending but not receiving any agj-packets from remote
>>>> router
>>>> >
>>>> >
>>>> >
>>>> > On Wed, Apr 8, 2009 at 3:40 PM, Dheven <dheven_at_gmail.com> wrote:
>>>> >
>>>> >> R1#ping 10.10.10.2
>>>> >>
>>>> >> Type escape sequence to abort.
>>>> >> Sending 5, 100-byte ICMP Echos to 10.10.10.2, timeout is 2 seconds:
>>>> >> !!!!!
>>>> >> Success rate is 100 percent (5/5), round-trip min/avg/max = 4/4/4 ms
>>>> >>
>>>> >> R1#sh isis neighbors
>>>> >>
>>>> >> System Id Type Interface IP Address State Holdtime
>>>> Circuit Id
>>>> >> R1#
>>>> >>
>>>> >>
>>>> >> On Wed, Apr 8, 2009 at 2:29 PM, Ernest Wambari <ewambari_at_gmail.com
>>>> >wrote:
>>>> >>
>>>> >>> Hello Dheven,
>>>> >>>
>>>> >>> Please provide the following:
>>>> >>>
>>>> >>> 1.sh clns nei
>>>> >>> 2.debug isis adj-packet
>>>> >>>
>>>> >>> Regards,
>>>> >>>
>>>> >>> W.
>>>> >>>
>>>> >>> On Wed, Apr 8, 2009 at 2:57 PM, Dheven <dheven_at_gmail.com> wrote:
>>>> >>>
>>>> >>>> Hi GS,
>>>> >>>> I am having a issue setting up IS-IS over ethernet subinterfaces.
>>>> >>>>
>>>> >>>> here is my setup:
>>>> >>>>
>>>> >>>> R1 (trunk) ---(trunk) SW1 (trunk) ----(trunk) SW2 (trunk) -----
>>>> (trunk)
>>>> >>>> R2
>>>> >>>>
>>>> >>>>
>>>> >>>> R1 Configs:
>>>> >>>>
>>>> >>>> int fa0/0.12
>>>> >>>> encapsulation dot1q 12
>>>> >>>> ip address 10.10.10.1 255.255.255.0
>>>> >>>> ip router isis
>>>> >>>>
>>>> >>>> router isis
>>>> >>>> net 47.0001.0000.0000.0001.00
>>>> >>>>
>>>> >>>>
>>>> >>>> SW1 configs:
>>>> >>>>
>>>> >>>> fa0/1
>>>> >>>> switchport trunk encap dot1q
>>>> >>>> switch port trunk allowed vlan 12
>>>> >>>> switch mode trunk
>>>> >>>>
>>>> >>>> vlan 12 is carried across the trunk link between SW1 and SW2
>>>> >>>>
>>>> >>>> R2 configs:
>>>> >>>>
>>>> >>>> Int fa0/0.12
>>>> >>>> encapsulation dot1q 12
>>>> >>>> ip address 10.10.10.2 255.255.255.0
>>>> >>>> ip router isis
>>>> >>>>
>>>> >>>> router isis
>>>> >>>> net 49.0001.0000.0000.0002.00
>>>> >>>>
>>>> >>>> SW2 configs:
>>>> >>>> int fa0/2
>>>> >>>> switchport trunk encap dot1q
>>>> >>>> switch port trunk allowed vlan 12
>>>> >>>> switch mode trunk
>>>> >>>>
>>>> >>>>
>>>> >>>> Please help.
>>>> >>>>
>>>> >>>> Regards
>>>> >>>>
>>>> >>>> Dheven
>>>> >>>>
>>>> >>>>
>>>> >>>> Blogs and organic groups at http://www.ccie.net
>>>> >>>>
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>>>> >>>>
>>>> >>>>
>>>> >>>
>>>> >>
>>>> >>
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>>>> >>
>>>> >>
>>>> >
>>>>
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>>>
>>>
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>>>
>>
>>
>> --
>> Always forgive your enemies - Nothing annoys them so much.
>>
>>
>>
>

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