Devices take a long time to come up on Token Ring because they have to
select an active monitor which can take many seconds. So the routers are
probably learning the EIGRP path much more quickly because the serial
interfaces come up immediately. Also, EIGRP generally learns new routes
quicker than RTMP anyway, regardless of the data-link layer.
I don't think AppleTalk has any concept of administrative distance.
Whichever path is learned first is the one that ends up in the routing
table. You could try using the "appletalk maximum-paths" command to put
more than one route in the table. The software then distributes output on a
packet-by-packet basis in round-robin fashion. (Note that it really is
packet-by-packet load-sharing and not load sharing by destination, unlike IP.)
In answer to your question about G in the output of the "show appletalk
route" command, the letter after the hop count shows the state of the
route. G means "good." The state goes from good to suspect to bad.
With RTMP, if one RTMP update is missed, the route immediately becomes
suspect. RTMP sends updates every 10 seconds, so the route becomes suspect
if an update hasn't been heard in 10 seconds. After 20 seconds, the route
is considered bad and eligible for replacement by a path with a higher hop
count. After 60 seconds by default, the route is removed. You can change
these parameters with the "appletalk timers" command.
HTH,
Priscilla
At 12:00 AM 9/17/00, Kirk Bollinger wrote:
>I have two routers connected via tokenring and a 64K serial crossover.
>
>I'm running RTMP over the tokenring and appletalk EIGRP over the serial
>link. My routes are favoring the serial link.
>
>Obviously with DVRP's both paths are seen as one hop.
>
>I played with both the bandwidth and delay on the serial link but, it
>wasn't enough to change the route.
>
>How can I get this to reflect the best path?
>
>I looked into administrative distance and offset list but could find an
>answer there.
>
>Assuming end stations on the tokenring - use both RTMP and EIGRP on it?
> - yes, this works but I would think there should be another way.
>
>
>Also, the routes are list as [1/G] - the 1 is hops what is the G ??
>
>-Kirk
>
>With the serial link shut
>
>VENUS#sh apple rou 198
>Codes: R - RTMP derived, E - EIGRP derived, C - connected, A - AURP
> S - static P - proxy
>3 routes in internet
>
>The first zone listed for each entry is its default (primary) zone.
>
>R Net 198-198 [1/G] via 40.1, 1 sec, TokenRing0, zone ether
> Route installed 00:00:01, updated 1 sec ago
> Next hop: 40.1, 1 hop away
> Zone list provided by 40.1
> Valid zones: "ether"
> There is 1 path for this route
>* RTMP path, to neighbor 40.1, installed 00:00:01 via TokenRing0
> Composite metric is 256524800, 1 hop
>VENUS#
>
>Normal Operation
>
>
>VENUS#sh apple ro 198
>Codes: R - RTMP derived, E - EIGRP derived, C - connected, A - AURP
> S - static P - proxy
>3 routes in internet
>
>The first zone listed for each entry is its default (primary) zone.
>
>E Net 198-198 [1/G] via 101.43, 238 sec, Serial1, zone ether
> Route installed 00:11:02, updated 238 secs ago
> Next hop: 101.43, 1 hop away
> Zone list provided by 101.43
> Valid zones: "ether"
> There is 1 path for this route
>* EIGRP path, to neighbor 101.43, installed 00:03:58 via Serial1
> Composite metric is 2195456, 1 hop
> Delay is 537600 microseconds, minimum bandwidth is 1657856 Kbit
> Reliability 255/255, minimum MTU 1500 bytes
> Loading 1/255, 1 EIGRP hop
> Path is derived from CONNECTED from 2
> Path's external metric is 0 hops
>
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________________________
Priscilla Oppenheimer
http://www.priscilla.com
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