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.

New Member

Pb Frame relay FECN

Hi,

I meet a problem when I've activated a New PVC :

In this configuration :

SIG_________Cloud FR________LYON-A

A pvc (1536 BW) has been created between this two devices DTE.

After this, LYON-A received FECN packets from SIG (all packets IN are equals to FECN IN).

Then, the router makes a crash because of BUS error.

I've remarked after that the router SIG has been configured to be a Frame-Relay Switch, and that it was FECN packets OUT from this router to LYON-A.

I have understand the cause of the problem but i can't understand why the SIG DCE detects a congestion and where !!!

LYON-A#sh fram pvc

PVC Statistics for interface Serial0/0 (Frame Relay DTE)

Active Inactive Deleted Static

Local 1 0 0 0

Switched 0 0 0 0

Unused 0 0 0 0

DLCI = 18, DLCI USAGE = LOCAL, PVC STATUS = ACTIVE, INTERFACE = Serial0/0.1

input pkts 13091 output pkts 12961 in bytes 13606575

out bytes 3184678 dropped pkts 0 in FECN pkts 12979

in BECN pkts 0 out FECN pkts 0 out BECN pkts 0

in DE pkts 0 out DE pkts 0

out bcast pkts 497 out bcast bytes 48144

pvc create time 01:37:18, last time pvc status changed 00:35:08

Priority DLCI Group 1, DLCI 18 (HIGH), DLCI 18 (MEDIUM)

DLCI 18 (NORMAL), DLCI 18 (LOW)

1 REPLY
Bronze

Re: Pb Frame relay FECN

In your WAN links there is congestion problem. You have check the FR link

What are FECN and BECN packets? How do they affect performance?

http://www.cisco.com/warp/public/116/fr_faq.html#16

http://www.cisco.com/en/US/products/sw/iosswrel/ps1828/products_configuration_guide_chapter09186a00800ca5a1.html#xtocid2546717

Traffic Shaping

http://www.cisco.com/warp/public/125/21.shtml#21-B

84
Views
0
Helpful
1
Replies