Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Announcements

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. And see here for current known issues.

Frame Relay Theory question...

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

1 ACCEPTED SOLUTION

Accepted Solutions
Hall of Fame Super Silver

Re: Frame Relay Theory question...

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

5 REPLIES
Hall of Fame Super Gold

Re: Frame Relay Theory question...

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

You can then re-enable keepalives.

Re: Frame Relay Theory question...

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

Hall of Fame Super Gold

Re: Frame Relay Theory question...

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

Hall of Fame Super Silver

Re: Frame Relay Theory question...

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

Re: Frame Relay Theory question...

You are 110% correct. I took out frame-relay switching, removed the inft dce statement, map'd to the same DLCI's, and it worked....thank you.

I appreciate your posting on this topic and all the other ones you regularly contribute too.

Jimmy

370
Views
0
Helpful
5
Replies
CreatePlease login to create content