Re: IS-IS issue over ethernet subinterface

Hi Dheven,

You could check these switches system MTU settings.Check if the match.

Regards,

W.

On Wed, Apr 8, 2009 at 9:20 PM, Dheven <dheven_at_gmail.com> wrote:

> 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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>>>>> >>>>
>>>>> >>>>
>>>>> >>>>
>>>>> >>>
>>>>> >>
>>>>> >>
>>>>> >> --
>>>>> >> Always forgive your enemies - Nothing annoys them so much.
>>>>> >>
>>>>> >>
>>>>> >>
>>>>> >
>>>>>
>>>>>
>>>>> --
>>>>> Always forgive your enemies - Nothing annoys them so much.
>>>>>
>>>>>
>>>>> Blogs and organic groups at http://www.ccie.net
>>>>>
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>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
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>>>>> database 3981 (20090401) __________
>>>>>
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>>>>>
>>>>> The message was checked by ESET NOD32 Antivirus.
>>>>>
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>>>>>
>>>>>
>>>>
>>>>
>>>> --
>>>> Always forgive your enemies - Nothing annoys them so much.
>>>>
>>>>
>>>>
>>>
>>>
>>> --
>>> Always forgive your enemies - Nothing annoys them so much.
>>>
>>>
>>>
>>
>
>
> --
> Always forgive your enemies - Nothing annoys them so much.

Blogs and organic groups at http://www.ccie.net
Received on Thu Apr 09 2009 - 06:43:31 ART