I am working through Caslow's Bridges Router and Switches book and I am
trying to get a firm understanding of frame-relay.
I have generally recreated the lab on page 126 with the minor changes of
adding another router and changing addresses. For those without the book
(which is very good by the way) this is frame on physical interfaces in a
hub and spoke configuration.
The hub can ping all spokes, and each spoke can ping the hub. However,
spokes can not ping each other until the 'frame-relay map ip" statement is
added to point to each spoke.
Everything can now ping everything else. Now we save the configs and
reload.
Since map statements have not been added on the spokes to point to the hub
(since they were originally learned dynamically) I expect that dynamic
inverse arp to be disabled, and there will be no dynamic entries on the
spokes for the same protocol and the same dlci.
This is not the case in my lab.... here is the relevant part of the config
on one spoke, and the results of 'show frame-relay map'
interface Serial1
ip address 192.168.14.2 255.255.255.0
encapsulation frame-relay
frame-relay map ip 192.168.14.3 201
frame-relay map ip 192.168.14.4 201
no frame-relay inverse-arp
Router2#sho frame-relay map
Serial1 (up): ip 192.168.14.1 dlci 201(0xC9,0x3090), dynamic,
broadcast,, status defined, active
Serial1 (up): ip 192.168.14.3 dlci 201(0xC9,0x3090), static,
CISCO, status defined, active
Serial1 (up): ip 192.168.14.4 dlci 201(0xC9,0x3090), static,
CISCO, status defined, active
Can someone explain why this is happening? (also explain how disabling
frame-realy inverse arp works since I get similar results).
Thanks
Ed
Edward Moss, CCNP, CCDP
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