[c-nsp] Cisco Local Area Mobility - (LAM)

[Bogdan Radulescu]

No. afaik i dont need it. (although I've tried it)
I've tested this with dyna and real switches, the same logical topology 
and it works as expected.


Tassos Chatzithomaoglou wrote:
> Do you have the global "router mobile" configured?
>
> -- 
> Tassos
>
> Bogdan Radulescu wrote on 03/07/2009 12:08:
>> Hello all,
>>
>> I'm trying to use LAM on the following topology without much luck...
>>
>> V100left---|3560G|---p-t-pL3link--|6500|---l2link--|7600|--V100right
>>
>> V100left = SVI = 172.16.224.0/19
>> V100right = SVI = 192.168.224.0/19
>> V100right just random subnet, no clients
>> 7600#interface Vlan100
>>         ip address 192.168.224.1 255.255.0.0
>>         ip mobile arp timers 1 1
>>        end
>>
>> Between 6500 and 7600 i have a dynamic routing protocol and 6500 
>> announces V100left into BGP.
>> 6500 has a static route for V100left to 3560G.
>> Connected to 7600 there is a server on V150 that needs to "talk" with 
>> these "clients"
>> Clients don't need to talk to each other.
>>
>> I would like to move clients from V100 left to V100 right. I don't 
>> want to change ip addresses.
>> V100left will be moved when all clients move to the right.
>>
>> It looks like 7600 detects the foreign ip on it's interface 
>> V100right, but doesn't put a "mobile" route for it.
>> All i can see is this:
>> --------------------------------
>> Local MobileIP: aging arp mobility cache entries
>> Local MobileIP: aging arp entry 172.16.225.153 60028 60000 60000
>> Local MobileIP: Vlan100 add 172.16.225.153 accepted
>> Local MobileIP: Vlan100 add 172.16.225.153 accepted
>> Local MobileIP: Vlan100 add 172.16.225.153 accepted
>> ----------------------------------
>> 7600#sh arp vlan 100 detail
>> ARP entry for 172.16.225.153, link type IP.
>>  Simple Application, via Vlan100, last updated 0 minute ago.
>>  Created by "IP Mobility".
>>  Encap type is ARPA, hardware address is 0006.1901.2925, 6 bytes long.
>>  ARP subblocks:
>>  * Application Simple ARP Subblock
>>    Entry is complete.
>>  * IP ARP Adjacency
>>    Adjacency (for 172.16.225.153 on Vlan100) was installed.
>>  * IP Mobility
>>    ARP Application entry for application IP Mobility.
>>  * IP ARP VLAN ID
>>    Subblock data size is 4 bytes.
>>    VLAN IN ID: 100
>>    VLAN OUT ID: 100
>> ------------------------------------------
>> 7600#sh ip route | i 172.16.225.153
>> *?        172.16.225.153/32 [0/1] via 172.16.225.153*
>> ------------------------------------------
>> sh ip route 172.16.225.153
>> Routing entry for 172.16.225.153/32
>>  Known via "connected", distance 0, metric 1
>>  Last update from 172.16.225.153 00:41:57 ago
>>  Routing Descriptor Blocks:
>>  * 172.16.225.153
>>      Route metric is 1, traffic share count is 1
>> ------------------------------------------
>>
>> debug ip packet detail gives me this
>>
>> Jul  2 23:32:19: FIBipv4-packet-proc: route packet from (local) src 
>> 172.16.0.1 dst 172.16.225.153
>> Jul  2 23:32:19: FIBfwd-proc: Default:172.16.225.153/32 proces level 
>> forwarding
>> Jul  2 23:32:19: FIBfwd-proc: depth 0 first_idx 0 paths 1 long 0(0)
>> Jul  2 23:32:19: FIBfwd-proc: try path 0 (of 1) 
>> v4-rcrsv-172.16.225.153 first short ext 0(-1)
>> Jul  2 23:32:19: FIBfwd-proc: v4-rcrsv-172.16.225.153 valid
>> Jul  2 23:32:19: FIBfwd-proc: ip_pak_table 0 ip_nh_table 0 if none nh 
>> 172.16.225.153 deag 0 via fib 0 path type recursive
>> Jul  2 23:32:19: FIBfwd-proc: Default:172.16.225.153/32 not enough 
>> info to forward via fib (none 172.16.225.153)
>> Jul  2 23:32:19: FIBipv4-packet-proc: packet routing failed
>> Jul  2 23:32:19: IP: s=172.16.0.1 (local), d=172.16.225.153, len 100, 
>> unroutable
>> Jul  2 23:32:19:     ICMP type=8, code=0
>>
>> On the same 7600 i have several other VLANs with subnets from  
>> 172.16.0.0/16 and some
>> L3 interfaces part of other VRFs
>>
>>
>> Is what i want possible or i\m wasting my time and yours? :)
>>
>> Thank you
>>
>>
>>
>>
>>
>>
>>
>>
>>
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>

-- 
...................................

Bogdan Radulescu

IP Backbone Engineer
RCS & RDS Constanta
Phone: +40 341-400440
Fax  : +40 341-400450

E-mail: bogdan at constanta.rdsnet.ro
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