From: Nnanna Obuba (obuba@xxxxxxxxxxxxxxxx)
Date: Fri Apr 07 2000 - 00:09:13 GMT-3
Even if you have full mesh connectivity, you still need the 'appletalk
local-routing' command on the hub.
Nnanna
----- Original Message -----
From: "Richard Wagner" <rfwagner@hotmail.com>
To: <ericlemmons@yahoo.com>; <ccielab@groupstudy.com>
Sent: Thursday, April 06, 2000 10:15 PM
Subject: Re: appletalk eigrp over frame
> I might have the answer to why you can't AT ping. Even if I miss the
problem
> completely, I do see a potential trouble spot with your frame-relay
> configurations. Look at your frame relay maps.
>
> Since the hub can see both sides, inverse-ARP will resolve the addresses
for
> you. Don't change a thing.
>
> You are partially right to add the "other hub" map statement at the
spokes.
> You need to go a step further.
>
> Let's look at your frame maps:
> >Serial0/0 (up): appletalk 101.1 dlci
> >100(0x64,0x1840), dynamic,
> > broadcast,, status defined, active
> >Serial0/0 (up): appletalk 101.2 dlci
> >100(0x64,0x1840), static,
> > broadcast,
> > CISCO, status defined, active
>
> Note that the spoke is STATIC and the hub is DYNAMIC. This will work
right
> up until you reboot the router. When you issue the frame-relay map
command
> for particular protocol and DLCI, inverse-ARP is disabled for that
protocol
> on that DLCI. Bounce them (if you haven't already) and take a look at
your
> frame relay maps... the dynamic entries should not return (and only your
> static maps will be there).
>
> That means that you won't dynamically learn the HUB router when you reboot
> because your static statement will disable inverse-ARP. To fix this, put
in
> a frame-relay map command for the hub router too.
>
> While you're at it, put in one for your own IP and point it to the DLCI
> coming in... that will allow you to ping your own interface (saves
confusion
> sometimes).
>
> Even if this is not the problem, you should be aware of how inverse-ARP is
> affected by frame relay map commands.
>
> I recommend that you use the "no frame-relay inverse-arp" command on ALL
> THREE routers and statically map all connectivity. FYI, you might have a
> full mesh on your network and some odd/difficult test you may take someday
> will require that you DON'T use it. Inverse-ARP will use the full-mesh
and
> you will fail to meet the requirements of forcing a hub/spoke
configuration.
>
> In the end, have SIX mappings on each spoke router. All six point to the
> DLCI... three appletalk addresses and three IP addresses (R1, R2 and R3,
> even though you're mapping the IP of the interface!). Pick one of the two
> DLCIs on the hub when mapping the hub's own address to a DLCI.
>
> Finally, do a "debug appletalk packets" (or something like that)... run
the
> appletalk ping and check what each of the three routers do with the AT
ping.
> I expect that you will get some kind of "encapsulation failed" message
on
> some interface... and that can happen on the way there or on the way back.
> Find the OUTBOUND port it should be going out of and check out the
mappings
> on it. If you fatfingered R2's map statements, you will send it down a
> non-existent DLCI or you mapped the wrong address. Do a "show appletalk
> interface Serial0" to verify the configuration... make sure the node
address
> is perfectly right!
>
> show us the frame maps from all routers and also show us a "show
frame-relay
> pvc" command to see what's coming from the switch.
>
> Good luck!
>
>
>
>
> >From: Eric Lemmons <ericlemmons@yahoo.com>
> >Reply-To: Eric Lemmons <ericlemmons@yahoo.com>
> >To: ccielab@groupstudy.com
> >Subject: appletalk eigrp over frame
> >Date: Thu, 6 Apr 2000 15:46:00 -0700 (PDT)
> >
> >I'm trying to get appletalk routing with
> >appletlak eigrp working over a frame-relay hub
> >and spoke config.
> >I'm using all physical interfaces on the frame.
> >OSPF is working on the frame, utilizing
> >inverse-arp on the hub, and maps from the two
> >spokes to each other.
> >I've enabled appletalk on the serial/frame
> >interfaces, and they all come up fine, with no
> >errors.
> >I've disabled eigrp-splithorizon, and I've
> >manually mapped the spoke addresses in the same
> >manner as the IP mappings for OSPF.
> >I can ping the appletalk spokes from the hub, and
> >I can ping the hub from each of the spokes. But
> >no spoke to spoke pinging, even with the manual
> >maps.
> >Here are the configs:
> >
> >The HUB - hostname R1
> >!
> >interface Serial0
> > ip address 130.20.100.1 255.255.255.0
> > encapsulation frame-relay
> > ip ospf network broadcast
> > ip ospf priority 200
> > appletalk cable-range 100-120 101.1
> > appletalk zone FrameZone
> > appletalk protocol eigrp
> > no appletalk protocol rtmp
> > no appletalk eigrp-splithorizon
> > frame-relay lmi-type cisco
> >
> >SPOKE R2
> >!
> >interface Serial0/0
> > ip address 130.20.100.2 255.255.255.0
> > no ip directed-broadcast
> > encapsulation frame-relay
> > ip ospf network broadcast
> > ip ospf priority 0
> > no ip mroute-cache
> > appletalk cable-range 100-120 101.2
> > appletalk zone FrameZone
> > appletalk protocol eigrp
> > no appletalk protocol rtmp
> > no appletalk eigrp-splithorizon
> > frame-relay map appletalk 101.3 100 broadcast
> > frame-relay map ip 130.20.100.3 100 broadcast
> > frame-relay lmi-type cisco
> >
> >SPOKE R3
> >
> >interface Serial0/0
> > ip address 130.20.100.3 255.255.255.0
> > no ip directed-broadcast
> > encapsulation frame-relay
> > ip ospf network broadcast
> > ip ospf priority 0
> > no ip mroute-cache
> > appletalk cable-range 100-120 101.3
> > appletalk zone FrameZone
> > appletalk protocol eigrp
> > no appletalk protocol rtmp
> > no appletalk eigrp-splithorizon
> > frame-relay map appletalk 101.2 100 broadcast
> > frame-relay map ip 130.20.100.2 100 broadcast
> > frame-relay lmi-type cisco
> >
> >Here is "Show apple route" on R3:
> >
> >r3#show apple route
> >Codes: R - RTMP derived, E - EIGRP derived, C -
> >connected, A - AURP
> > S - static P - proxy
> >2 routes in internet
> >
> >The first zone listed for each entry is its
> >default (primary) zone.
> >
> >C Net 100-120 directly connected, Serial0/0, zone
> >FrameZone
> >E Net 200-210 [2/G] via 101.1, 1239 sec,
> >Serial0/0, zone EnetZone
> >
> >Here is the show frame map command on R3:
> >
> >r3#show frame map
> >Serial0/0 (up): appletalk 101.1 dlci
> >100(0x64,0x1840), dynamic,
> > broadcast,, status defined, active
> >Serial0/0 (up): appletalk 101.2 dlci
> >100(0x64,0x1840), static,
> > broadcast,
> > CISCO, status defined, active
> >Serial0/0 (up): ip 130.20.100.1 dlci
> >100(0x64,0x1840), dynamic,
> > broadcast,, status defined, active
> >Serial0/0 (up): ip 130.20.100.2 dlci
> >100(0x64,0x1840), static,
> > broadcast,
> > CISCO, status defined, active
> >
> >The commands show similar output on R2.
> >
> >Any help will be appreciated.
> >Eric
> >
> >
> >=====
> >(James) Eric Lemmons
> >615-834-9952 CELL 615-364-5818
> >
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