Hi Folks,
On Page 173, Jhonathan chin Book (Frame-Relay Solution Guide), there is example called "Monitoring and Verifying Frame-relay Traffic shaping on Switched PVC)
I used NetIQ Chariot version 5.0, to send stream traffic with the following script configuration:
file_size = 7000
send_buffer_size = 955
send_datatype = NOCOMPRESS
receive_buffer_size = Default
send_data_rate = 56Kbps
close_type = Reset
Destination_port = Auto
Source_port = Auto
Here is the Diagram
SERVER---Cisco RTA –DLCI 100---S0-Cisco 2522-S1---DLCI 200-Cisco RTB---SERVER
I am sending traffic RTB to RTA
Here is the map-class configuration of the Frame-Relay Switch (2522) configured on DLCI 100
CIR = 48000
Bc = 6000
Be = 0
Tc = 125 msec
Here is a quote from the book:
Size of Packet (inclusive of IP and Frame Relay Headers) = 1000 Bytes
Rate of traffic stream = 7 packets per second (effectively equivalent to 56000 bps)
On the server the traffic stream is turned on for a total duration of 5 minutes. As such, a total of 2100 packets (7 packets/sec x 300 sec)
In one TC interval, 7000 bits of data are transmitted out of interface on switched DLCI 100 at Router Switch (56000 bits/sec x 125 msec). Because the configured BC and Tc interval is only 6000 bits and Be = 0 , approximately 1000 bits falls short, and packet drops occur on the egress interface S1 of router switch at rate of packet per second. Hence 3000 Packets are dropped over a 5-minute period
Example 6-9 The show frame-relay pvc output after the traffic stream is transmitted
!
!
Output queue 0/1, 299 drop, 1402 dequeued.
!
Anyways, the above result is the ideal one, but I never got the same result, what I got is 500 packets dropped 200 Packets difference though I follow the following equation:
1000 – 8 – 9 – 8 – 20 = 955 bytes (8 for UDP, 9 the software overhead, 8 Frame-relay Overhead, 20 IP overhead)
I am sure that I miss the boat in the way to configure the NetIQ Chariot; hence any hints to rectify the problem will be appreciated.
Here is the result I got it when I configured the streaming script on NetIQ Chariot:
Frame-Relay-Switch#show interface serial 0
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 58000 bits/sec, 8 packets/sec
38 packets input, 1341 bytes, 0 no buffer
2447 packets output, 2199960 bytes, 0 underruns
Frame-Relay-Switch# Show frame-relay pvc 100
!
Output queue 0/1, 500 drop, 1721 dequeued
!
FRAME-RELAY ROUTER SWITCH
Show run
!
interface Serial0
no ip address
encapsulation frame-relay IETF
no fair-queue
clockrate 64000
frame-relay traffic-shaping
frame-relay interface-dlci 100 switched
class cir_48000
frame-relay lmi-type ansi
frame-relay intf-type dce
!
interface Serial1
no ip address
encapsulation frame-relay IETF
no fair-queue
clockrate 64000
frame-relay interface-dlci 200 switched
frame-relay lmi-type ansi
frame-relay intf-type dce
!
map-class frame-relay cir_48000
frame-relay cir 48000
frame-relay bc 6000
frame-relay be 0
frame-relay holdq 1
no frame-relay adaptive-shaping
.
.
RTB ROUTER
Show run
interface Serial0
ip address 10.1.1.2 255.255.255.252
encapsulation frame-relay IETF
no fair-queue
frame-relay map ip 10.1.1.1 200 broadcast
frame-relay lmi-type ansi
!
ip classless
ip route 192.168.1.0 255.255.255.0 10.1.1.1
ip http server
!
!
!
RTA
!
frame-relay de-list 1 protocol ip gt 500
!
!
!
interface Ethernet0
ip address 192.168.1.1 255.255.255.0
!
nterface Serial0
ip address 10.1.1.1 255.255.255.252
encapsulation frame-relay IETF
no fair-queue
frame-relay de-group 1 100
frame-relay map ip 10.1.1.2 100 broadcast
frame-relay lmi-type ansi
frame-relay broadcast-queue 100 8000 1
!
ip classless
ip route 172.16.1.0 255.255.255.0 10.1.1.2
ip http server
