12-16-2008 12:45 PM - edited 03-04-2019 12:43 AM
Hello all,
I need pointer to a link (I have already check cisco frame relay config documents on CCO) or document which will be able to provide info on how to configure frame relay point to point subinterfaces on R1, R2 and R3 where all three routers are connected to FR switch. Except for R1 which has two WAN links connected with FR switch, rest of the routers have only 1 WAN link.
I will be using OSPF for routing.
Thanks in advance
12-16-2008 12:52 PM
Hello Asim
int serx/y
encapsulation frame-relay
no ip address
int serx/y.M point-to-point
ip address yourwan.ipaddr mask
frame-relay interface-dlci DLCI#
router ospf 10
network yourwan wildcard area xxx
on point-to-point subifs OSPF run smoothly using point-to-point network type
the frame-rel interface-dlci DCLI#
refers to the DLCI to be used on the local router to reach the router on the other end
R1 will have two p-t-p subifs that can be on the same physical interface or one in each.
the subnet can be /30 because OSPF is classless.
You need to use two different /30 subnets one for R1-R2 logical link and one for R1-R3 logical link
Hope to help
Giuseppe
12-16-2008 12:54 PM
Thanks Giuseppe.
How about config on the FR switch? Please advice.
12-16-2008 01:07 PM
Hello Asim,
see the section frame-relay switching from 12.4 Wan Configuration guide
you need to enable frame-relay switching on the node at the global level
on each interface you need to have it behave like a FR switch port (change in FR LMI role)
frame-relay intf-type dce
skip the connect command is for ISDN (never used)
frame-relay route in-dlci interface out-interface-type out-interface-number out-dlci
you need to build the also the reverse path on the other interface to create a full duplex PVC
usually DCE layer1 (that follows cable type) and DCE L2 are on the same side
you can check cable type sensed with
sh controller ser x/y (it works on several platforms not all)
edit
important: the interface with DCE cable has to provide clock with command
clock rate xxxx
Hope to help
Giuseppe
12-16-2008 02:02 PM
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