From: Robert Marnell (rmarnell@xxxxxxxxxxx)
Date: Thu Aug 31 2000 - 07:35:31 GMT-3
Mark,
There is a situation with the new T-1/PRI cards, VIP2 and 7500 series
routers. Inverse ARP is not working with the 11.1 code. The VIP2 is not
encapsulating the ip packets for frame-relay. You must statically map the
ip to the dlci under a sub-interface. I believe a code upgrade fixes the
problem, but if you have to use 11.1, then Cisco Case A588501.
>From: "Eric Fairfield" <ericfair@chorus.net>
>Reply-To: "Eric Fairfield" <ericfair@chorus.net>
>To: "Kevin Baumgartner" <kbaumgar@cisco.com>, <masalmon@cisco.com>
>CC: <ccielab@groupstudy.com>
>Subject: Re: Inverse ARP and Subinterfaces
>Date: Wed, 30 Aug 2000 14:18:13 -0500
>
>There can be issues using Inverse-Arp and cRTP with VoIP. Using MAP
>statements is the most reliable.
>----- Original Message -----
>From: Kevin Baumgartner <kbaumgar@cisco.com>
>To: <masalmon@cisco.com>
>Cc: <ccielab@groupstudy.com>
>Sent: Tuesday, August 29, 2000 10:49 PM
>Subject: Re: Inverse ARP and Subinterfaces
>
>
> > My recommendation is to not depending on inverse arp when doing
> > the lab. It can be something problematic to get things working and
> > you can waste a lot of time trying to get things to work.
> >
> > I know of someone that spend 1/2 of the first day just trying to
> > get framerelay working and pinging between routers. And didn't even
> > get to finish most of the questions because of this.
> >
> > The recommend I heard from some which I agree with is
> > Frame-relay map, frame-relay map, frame-relay map ...
> >
> > - Kevin
> >
> > >
> > > No can do you are using map statements. My contention is to use
>inverse
> > > arp. I realize that you can use map statements to achieve
> > > reachability. I wish ot use inverse arps on the hub router.
> > >
> > > Simon Baxter wrote:
> > > >
> > > > Yip, just added it just for you!!
> > > >
> > > > interface Serial0
> > > > ip address 192.1.1.2 255.255.255.0
> > > > encapsulation frame-relay
> > > > no ip mroute-cache
> > > > ip policy route-map policy
> > > > frame-relay traffic-shaping
> > > > frame-relay priority-dlci-group 1 100 200 300 400
> > > > frame-relay map bridge 400 broadcast
> > > > frame-relay map ip 192.1.1.1 100 broadcast
> > > > frame-relay map ipx A.0000.0c01.1235 300 broadcast
> > > > frame-relay map appletalk 300.1 200 broadcast
> > > > no frame-relay inverse-arp
> > > > frame-relay qos-autosense
> > > > !
> > >
> > > > interface Serial0.2 multipoint
> > > > ip address 202.1.1.2 255.255.255.0
> > > > cdp enable
> > > > frame-relay interface-dlci 500
> > > > !
> > > >
> > > > RTRB#
> > > > RTRB#show frame map
> > > > Serial0 (up): bridge dlci 400(0x190,0x6400), static,
> > > > broadcast,
> > > > CISCO, status defined, active
> > > > Serial0 (up): ip 192.1.1.1 dlci 100(0x64,0x1840), static,
> > > > broadcast,
> > > > CISCO, status defined, active
> > > > Priority DLCI Group 1, DLCI 100 (HIGH), DLCI 200 (MEDIUM)
> > > > DLCI 300 (NORMAL), DLCI 400 (LOW)
> > > > Serial0.2 (up): ip 202.1.1.1 dlci 500(0x1F4,0x7C40), dynamic,
> > > > broadcast,, status defined, active
> > > > Serial0 (up): ipx A.0000.0c01.1235 dlci 300(0x12C,0x48C0), static,
> > > > broadcast,
> > > > CISCO, status defined, active
> > > > Serial0 (up): appletalk 300.1 dlci 200(0xC8,0x3080), static,
> > > > broadcast,
> > > > CISCO, status defined, active
> > > > RTRB#ping 202.1.1.1
> > > >
> > > > Type escape sequence to abort.
> > > > Sending 5, 100-byte ICMP Echos to 202.1.1.1, timeout is 2 seconds:
> > > > !!!!!
> > > > Success rate is 100 percent (5/5), round-trip min/avg/max = 56/59/60
>ms
> > > > RTRB#
> > > >
> > > > as you'll see, everything else apart from s0.2 is static and no
>inverse
> > > > arped...
> > > >
> > > > Simon
> > > >
> > > > -----Original Message-----
> > > > From: mark salmon [mailto:masalmon@cisco.com]
> > > > Sent: Wednesday, August 30, 2000 2:31 PM
> > > > To: ccielab@groupstudy.com
> > > > Subject: Inverse ARP and Subinterfaces
> > > >
> > > > HAs anyone been able to get inverse arp to work with frame relay
> > > > multipoint subinterfaces? According to Caslow, multipoint
>subinterfaces
> > > > do inverse arp by default. I have not been able to set it up that
>way
> > > > in a hub and spoke environment (both sides multipoint
>subinterfaces).
> > > >
> > > > Any ideas?
> > > > --
> > > >
> > > > Mark Salmon
> > > > Project Engineer
> > > > Cisco Professional Services
> > > > Phone:773-695-8235
> > > > Pager:800-365-4578
> > > > email: masalmon@cisco.com
> > > >
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