CCIE: ottobre 2013

Legacy FRTS

This is the most well-known FRTS method, which has been available for quite a while on Cisco routers. It is now being outdated by MQC configurations.
The key characteristic is that all settings are configured under map-class command mode, and later are applied to a particular set PVCs. The
same configuration concept was used for legacy ATM configuration mode (map-class atm).

Legacy FRTS has the following characteristics:

- Enabled with frame-relay traffic-shaping command at physical interface level
- Incompatible with GTS or MQC commands at subinterfaces or physical interface levels
- With FRTS you can enforce bitrate per-VC (VC-granular, unlike GTS), by applying a map-class to PVC
- When no map-class is explicitly applied to PVC, it’s CIR and Tc are set to 56K/125ms by default
- Shaping parameters are configured under map-class frame-relay configuration submode
- Allows to configure fancy-queueing (WFQ/PQ/CQ) or simple FIFO per-VC
- No option to configure fancy-queueing at interface level: interface queue is forced to FIFO (if no FRF.12 is configured)
- Allows for adaptive shaping (throttling down to minCIR) on BECN reception (just as GTS) and option to reflect incoming FECNs as BECNs
- Option to enable adaptive shaping which responds to interface congestion (non-empty interface

R25#sh frame-relay pvc 253
PVC Statistics for interface Serial0/0 (Frame Relay DTE)
DLCI = 253, DLCI USAGE = LOCAL, PVC STATUS = ACTIVE, INTERFACE = Serial0/0
input pkts 3753          output pkts 1313         in bytes 246264
out bytes 120733         dropped pkts 0           in pkts dropped 0
out pkts dropped 0                out bytes dropped 0
in FECN pkts 0           in BECN pkts 0           out FECN pkts 0
out BECN pkts 0          in DE pkts 0             out DE pkts 0
out bcast pkts 1234      out bcast bytes 100994
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
pvc create time 02:55:56, last time pvc status changed 02:28:38
R25#

interface Serial0/0
ip address 10.10.10.11 255.255.255.248
ip pim dr-priority 100
ip pim nbma-mode
ip pim sparse-mode
encapsulation frame-relay
ip ospf authentication message-digest
ip ospf message-digest-key 1 md5 cisco
ip ospf network point-to-multipoint
ipv6 address FE80::25 link-local
ipv6 address 2001:CC1E:ABCD:100:10:10:2:11/64
ipv6 ospf network point-to-multipoint
ipv6 ospf 1 area 0
serial restart-delay 0
frame-relay map ipv6 2001:CC1E:ABCD:100:10:10:2:9 253 broadcast
frame-relay map ipv6 2001:CC1E:ABCD:100:10:10:2:10 254 broadcast
frame-relay map ipv6 FE80::23 253
frame-relay map ipv6 FE80::24 254
frame-relay map ip 10.10.10.10 254 broadcast
frame-relay map ip 10.10.10.9 253 broadcast
frame-relay interface-dlci 253
class frts
no frame-relay inverse-arp

R25(config)#interface Serial0/0
R25(config-if)#frame-relay traffic-shaping

IN QUESTO MODO SI ABILITA IL TRAFFIC SHAPING   E L'OUTPUT DEL COMANDO PRECEDENTE CAMBIA "sh frame-relay pvc 253"

R25#sh frame-relay pvc 253
PVC Statistics for interface Serial0/0 (Frame Relay DTE)
DLCI = 253, DLCI USAGE = LOCAL, PVC STATUS = ACTIVE, INTERFACE = Serial0/0
input pkts 3820          output pkts 1337         in bytes 250704
out bytes 123017         dropped pkts 0           in pkts dropped 0
out pkts dropped 0                out bytes dropped 0
in FECN pkts 0           in BECN pkts 0           out FECN pkts 0
out BECN pkts 0          in DE pkts 0             out DE pkts 0
out bcast pkts 1257      out bcast bytes 102950
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
pvc create time 02:59:05, last time pvc status changed 02:31:47
cir 1000      bc 8000      be 0         byte limit 15     interval 125 <-- parametri prima assenti
mincir 500       byte increment 15    Adaptive Shaping none     <-- parametri prima assenti
pkts 4         bytes 366       pkts delayed 0         bytes delayed 0 <-- parametri prima assenti
shaping inactive
traffic shaping drops 0
Output queue 0/40, 0 drop, 0 dequeued