RE: Mobile IP config

From: Mark Lasarko (mlasarko@co.ba.md.us)
Date: Tue Sep 19 2006 - 12:41:04 ART


Greetings Dave, Leigh, & GS :)

I do not have quite as elaborate a working config but can offer a few notes:

1. I do not "redistribute mobile" on the FA's (or MN's)

2. I use "ip irdp..." with "ip mobile foreign-service" on the FA care-of
interfaces
    (see documentation, there are a few commands you may want for IRDP)

3. "ip mobile arp" is LAM, a different *thing*
     (and I think you need proxy-arp for this to function, BTW)

4. I generally include a metric or the subnets keyword on the HA "redistribute
mobile"

5. I have had perfectly good configs not register hosts due to the clocks
being too far out of sync. Set your time on everything as close as possible.
This is very easy to miss in a lab environment (at least it was for me one
long weekend).

6. Try the "ip mobile host <range> virtual-network..." command
    (Dave, are you trying to use DHCP here?)

7. Add the "sh ip mob int" command to your output to share with us (please)

I had this lab'd up for a couple months about a year ago using mobile routers
and hosts alike.
I could probably dig up the configs and lab it up again if you need more
input.
It was pretty cool - (wireless) MAR's and what not...
Then I had to deploy the "toys"!
HTH,
~M

>>> "Schulz, Dave" <DSchulz@dpsciences.com> 09/19/06 9:23 AM >>>

Leigh -

Thanks for the response. I believe that ip mobile arp is part of a different
technology than Mobile IP. However, I did a search on Mobile IP on group
study and it appears to be an avoided subject. And, no one appears to have
an
interest in it.

Dave

________________________________

From: Leigh Harrison [mailto:ccileigh@gmail.com]
Sent: Tue 9/19/2006 4:45 AM
To: Schulz, Dave
Subject: Re: Mobile IP config

Hey Dave,

Do you not need to put in "ip mobile arp" ?

LH

Schulz, Dave wrote:
> GS -
>
> For some reason, I cannot get this configuration of Mobile IP to work
> after studying the DocCDs on the subject. The host 10.1.1.7 won't
> register on the FA (R2) when connected. Here are the configs:
>
> Any help is appreciated.....
>
>
> R1 -
> !
> interface FastEthernet0/0
> ip address 10.1.1.1 255.255.255.0
> duplex auto
> speed auto
> !
> interface Serial0/0
> ip address 172.16.1.1 255.255.255.0
> encapsulation frame-relay
> frame-relay map ip 172.16.1.3 103 broadcast
> frame-relay map ip 172.16.1.1 102
> frame-relay map ip 172.16.1.2 102 broadcast
> no frame-relay inverse-arp
> !
> router mobile
> !
> router eigrp 100
> redistribute mobile
> network 172.16.1.0 0.0.0.255
> no auto-summary
> !
> !
> ip mobile home-agent broadcast
> ip mobile virtual-network 10.0.0.0 255.0.0.0
> ip mobile host 10.1.1.7 interface FastEthernet0/0
> ip mobile secure host 10.1.1.7 spi 100 key ascii cisco algorithm md5
> mode prefix-suffix
> !
> !
>
> R2 -
>
> !
> !
> interface FastEthernet0/0
> ip address 20.1.1.1 255.255.255.0
> ip mobile foreign-service
> duplex auto
> speed auto
> !
> interface Serial0/0
> ip address 172.16.1.2 255.255.255.0
> ip mobile foreign-service
> encapsulation frame-relay
> frame-relay map ip 172.16.1.3 201
> frame-relay map ip 172.16.1.1 201 broadcast
> frame-relay map ip 172.16.1.2 201
> no frame-relay inverse-arp
> !
> router mobile
> !
> router eigrp 100
> redistribute mobile
> network 172.16.1.0 0.0.0.255
> no auto-summary
> !
> !
> ip mobile foreign-agent care-of FastEthernet0/0
> ip mobile foreign-agent care-of Serial0/0
> ip mobile secure home-agent 10.1.1.7 spi 100 key ascii cisco algorithm
> md5 mode prefix-suffix
> ip mobile foreign-service challenge
> ip mobile registration-lifetime 65535
> !
> !
>
>
> On R1 -
>
>
> R1#sh ip mob host
> Mobile Host List:
>
> Total 1
> 10.1.1.7:
> Allowed lifetime 10:00:00 (36000/default)
> Roam status -Unregistered-, Home link on interface FastEthernet0/0
> Accepted 0, Last time -never-
> Overall service time -never-
> Denied 0, Last time -never-
> Last code '-never- (0)'
> Total violations 0
> Tunnel to MN - pkts 0, bytes 0
> Reverse tunnel from MN - pkts 0, bytes 0
> R1#
> R1#sh ip mob glo
> IP Mobility global information:
>
> Home Agent
>
> Registration lifetime: 10:00:00 (36000 secs)
> Broadcast enabled
> Replay protection time: 7 secs
> Reverse tunnel enabled
> ICMP Unreachable enabled
> Strip realm disabled
> NAT Traversal disabled
> HA Accounting disabled
> NAT UDP Tunneling support enabled
> UDP Tunnel Keepalive 110
> Forced UDP Tunneling disabled
> Virtual networks
> 10.0.0.0 /8
>
> Foreign Agent is not enabled, no care-of address
>
> 1 interface providing service
> Encapsulations supported: IPIP and GRE
> Tunnel fast switching enabled, cef switching enabled
> Tunnel path MTU discovery aged out after 10 min
> R1#
>
> On R2 -
>
> R2#sh ip mob host
> %HA is not enabled
> R2#sh ip mob glo
> IP Mobility global information:
> Home Agent is not enabled
>
> Foreign Agent
>
> Pending registrations expire after 7 secs
> Care-of addresses advertised
> Mobile network route injection disabled
>
> FastEthernet0/0 (20.1.1.1) - up
> Serial0/0 (172.16.1.2) - up
>
> 2 interfaces providing service
> Encapsulations supported: IPIP and GRE
> Tunnel fast switching enabled, cef switching enabled
> Tunnel path MTU discovery aged out after 10 min
> NAT UDP Tunneling support enabled
> UDP Tunnel Keepalive 110
> Forced UDP Tunneling disabled
> R2#
> Dave Schulz,
> Email: dschulz@dpsciences.com <mailto:dschulz@dpsciences.com >
>
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