Solved: Frame Relay Theory question...

jimmysands73_2 · ‎05-08-2009

I was trying to help out another poster on this fourm, and was blaming Packet Tracer. I plugged his configs into two 2600's, but still cant get it working. But get I mean to simply ping the local ints and also directly connected int. I change encap to hdlc, can ping, so I know its not a layer 1 issue.

Can you setup to routers to pass traffic over Frame-Relay w/o specifically assinging one of them as a frame-relay switching?

RtrA-------serial connection-------dce-RtrB

Router A:

interface Serial0/1

ip address 172.16.0.9 255.255.255.252

encapsulation frame-relay

no keepalive

frame-relay map ip 172.16.0.9 103

frame-relay map ip 172.16.0.10 103 broadcast

no frame-relay inverse-arp

!

Router B:

interface Serial0/0

ip address 172.16.0.10 255.255.255.252

encapsulation frame-relay

no keepalive

no fair-queue

clock rate 64000

frame-relay map ip 172.16.0.9 301 broadcast

frame-relay map ip 172.16.0.10 301

no frame-relay inverse-arp

end

!

I tried using debug for frame-relay but its not showing me awhole lot.

I can post more info necessary.

Thank you

Jimmy

Giuseppe Larosa · ‎05-08-2009

Hello Jimmy,

back to back FR can be done in two ways:

a)

disabling keepalives

b)

making one side FR DCE as explained by Paolo

in any case if there is a direct cable between the two routers the DLCI cannot change at the two ends!

There is no FR switch/device in the middle so the DLCI must be the same.

I've explained this also in the other thread.

Hope to help

Giuseppe

View solution in original post

paolo bevilacqua · ‎05-08-2009

On side (customarily dce, but does not need to),configure frame-relay intf-type dce.

You can then re-enable keepalives.

jimmysands73_2 · ‎05-08-2009

Thank you for your response, tried both of them. Didnt help.....

R3(config-if)#frame-relay intf-type dce

Must enable frame-relay switching to configure DCE/NNI

R3(config-if)#

As far as the keepalives (both sides), when I did that, protocol went down.

R3(config-if)#keepalive

R3(config-if)#

*Mar 2 21:50:03.247: FR-ADJ: dlci 301: 172.16.0.10: removing adjacency

*Mar 2 21:50:03.247: FR-ADJ: dlci 301: 172.16.0.9: removing adjacency

*Mar 2 21:50:04.247: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/0, changed state to down

paolo bevilacqua · ‎05-08-2009

As the router says, configure frame-realy switching first.

Giuseppe Larosa · ‎05-08-2009