Showing posts with label FRTS. Show all posts
Showing posts with label FRTS. Show all posts

Sunday, January 29, 2012

FRF.12 Link Fragmentation and Interleaving calculation

Assuming we want to configure FRF.12 with interleaving and fragmentation delay of 10ms on a 768Kbps link:

Delay = Frame size (bits) / Link Bandwidth (bps)
0.01s = Frame size (bits) / 768,000 bps
Frame size = 7680 bits = 960 bytes

This is the configuration example extracted from the AutoQoS applied on the frame relay sub-interface

map-class frame-relay AutoQoS-FR-Se0/0/0:1-202
  frame-relay cir 768000
  frame-relay bc 7680
  frame-relay be 0
  frame-relay mincir 768000
  frame-relay fragment 960
  service-policy output AutoQoS-Policy-Trust