Re: Inverse-ARP with no LMI

Ok so Cisco says that inverse arp requires LMI to be on so it knows
what DLCIs to map.
However coming back to my question. Inverse-ARP still functions if LMI
is off, just as long as the "frame-relay interface-dlci" command is
configured.
What I was doing wrong was that I had not disabled LMI on the FR
Switch so the interfaces were down.
When I disabled LMI on Switch the interfaces came up and Inverse-ARP works fine:

interface Serial1/0
 ip address 10.0.0.1 255.255.255.0
 encapsulation frame-relay IETF
 no keepalive
 serial restart-delay 0
 frame-relay interface-dlci 102

*Oct 17 16:46:55.615: Serial1/0(o): dlci 102(0x1861), pkt encaps
0x0300 0x8000 0x0000 0x806 (ARP), datagramsize 30
*Oct 17 16:46:55.619: FR: Sending INARP Request on interface Serial1/0
dlci 102 for link 7(IP)
*Oct 17 16:46:55.659: broadcast dequeue
*Oct 17 16:46:55.659: Serial1/0(o):Pkt sent on dlci 102(0x1861), pkt
encaps 0x300 0x8000 0x0 0x806 (ARP), datagramsize 30
*Oct 17 16:46:55.751: Serial1/0(i): dlci 102(0x1861), pkt encaps
0x0300 0x8000 0x0000 0x806 (ARP), datagramsize 30
*Oct 17 16:46:55.751: Serial1/0: frame relay INARP received

R0#sh frame-relay map
Serial1/0 (up): ip 10.0.0.2 dlci 102(0x66,0x1860), dynamic,
              broadcast,
              IETF

I know this is not normal behaviour but I just wanted to know if
inverse-arp is dependent on LMI and this shows that it isnt.

Thanks

On 17 October 2010 15:16, <mikhail.detochkin_at_gmail.com> wrote:
> http://www.cisco.com/en/US/tech/tk713/tk237/technologies_q_and_a_item09186a008009457a.shtml
>
> Q. Can Frame Relay Inverse Address Resolution Protocol (IARP) work without
> Local Management Interface (LMI)?
>
>
> A. No. It uses LMI to determine which permanent virtual circuits (PVCs) to
> map.
>
>
> On Oct 17, 2010 5:58pm, Muzammil Malick <malickmuz_at_gmail.com> wrote:
>> Hi all
>>
>>
>>
>> When I have the following config I have no problems with connectivity
>>
>> and I can see inverse-arp requests and replies:
>>
>>
>>
>>
>>
>> interface Serial1/0
>>
>> ip address 10.0.0.1 255.255.255.0
>>
>> encapsulation frame-relay IETF
>>
>> serial restart-delay 0
>>
>> frame-relay interface-dlci 102
>>
>> end
>>
>>
>>
>> However when I switch off LMI on the interface (below) I can only see
>>
>> inverse-arp requests but no replies and so ping fails. Is inverse-arp
>>
>> dependent on LMI?
>>
>>
>>
>> interface Serial1/0
>>
>> ip address 10.0.0.1 255.255.255.0
>>
>> encapsulation frame-relay IETF
>>
>> no keepalive
>>
>> serial restart-delay 0
>>
>> frame-relay interface-dlci 102
>>
>> end
>>
>>
>>
>> Thanks
>>
>>
>>
>>
>>
>> Blogs and organic groups at http://www.ccie.net
>>
>>
>>
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>>
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Received on Sun Oct 17 2010 - 16:52:49 ART