Priority Queuing Lab



You can download the initial configuration files here.

To prepare for this lab only turn on one 800K link between R1 and R2, and the link between R4 and R1 for traffic generation. If you want traffic to make it around the lab then configure to your hearts content.

On R1:

  • Use priority list number 4.
  • Set smtp and pop3 with a high priority.
  • Set ssh and X11 with medium priority.
  • Set http, ftp and ntp as low priority.
  • Set telnet as normal priority.
  • Set the default priority as low.
  • Apply the configuration to S0/0.
  • Confirm the configuration and debug it.

Here are the protocols for which traffic is generated from our traffic generation configuration file:

for I in `grep dest-port r4-basic-tgn.cfg | cut -d\   -f 3`; do grep [[:space:]]$I/tcp /etc/services; done
telnet          23/tcp
http            80/tcp
ftp             21/tcp
ntp             123/tcp
pop3            110/tcp
smtp            25/tcp
ssh             22/tcp
x11             6000/tcp
jetdirect       9100/tcp

Answer is below:

R1 Configuration for PQ:

priority-list 4 protocol ip high tcp smtp
priority-list 4 protocol ip high tcp pop3
priority-list 4 protocol ip medium tcp 22
priority-list 4 protocol ip medium tcp 6000
priority-list 5 protocol ip normal tcp 23
priority-list 5 default low

interface Serial0/0
 bandwidth 800
 ip address
 priority-group 4

Confirm the configuration:

sh int s0/0
sh queueing

Debug the configuration:

debug priority
This entry was posted in Routing. Bookmark the permalink.

Leave a Reply

Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s