Velocity Reviews - Computer Hardware Reviews

Velocity Reviews > Newsgroups > Computing > Cisco > Need help in configuring WRED using TOS/DiffServ

Thread Tools

Need help in configuring WRED using TOS/DiffServ

Posts: n/a

ive got a big problem in understanding the documentation related to
WRED/RED-configuration on the CCO...

The priorization of VoIP-traffic on the WAN-side is doing well with
this configuration, but im trying to "tune" this basic configuration
for better voice-quality.
I need this feature for VoIP-Traffic-Priorization on the LAN-Interface,
but dont understand how to do it right, especially the options of the
IOS-command "random-detect dscp-based" mentioned by cisco in the
documents i read.

To specify my needs:
I want to prioritize traffic with the TOS/DiffServ value of 3, as this
is the relevant traffic of the voice-components. Also i have to mention
that i cannot alter this setting, so i have to work with it.
The idea is to set this, as an important traffic, to a very high
priorization level on the LAN-interface, so in no condition a voice
packet will be dropped.

Also i would thank you much if you could give me a short explanation/
configuration example of doing this based on my begun configuration as
seen below (see e0/0).

Sorry for my perhaps "dumb" question, but im very new in configuring
qos-networking, my main former experience was
tokenring/DLSW/Bridging/SNA, and as a result of this, i hadnt the
need for qos since now...

Thanks a lot in advance,


If you could write it in german, it would help me a lot further, since
its my motherlanguage


xxxxxxx#sh ver
Cisco Internetwork Operating System Software
IOS (tm) C2600 Software (C2600-I-M), Version 12.2(19), RELEASE SOFTWARE
Copyright (c) 1986-2003 by cisco Systems, Inc.
Compiled Tue 12-Aug-03 23:36 by kellmill
Image text-base: 0x8000808C, data-base: 0x80A183F0

ROM: System Bootstrap, Version 11.3(2)XA4, RELEASE SOFTWARE (fc1)

kaiserstrasse uptime is 1 year, 3 weeks, 6 days, 8 hours, 6 minutes
System returned to ROM by reload
System restarted at 05:58:31 METDST Sat May 8 2004
System image file is "flash:c2600-i-mz.122-19.bin"

cisco 2612 (MPC860) processor (revision 0x102) with 20480K/4096K bytes
of memory
Processor board ID JAB03490404 (2201902424)
M860 processor: part number 0, mask 49
Bridging software.
X.25 software, Version 3.0.0.
1 Ethernet/IEEE 802.3 interface(s)
1 Token Ring/IEEE 802.5 interface(s)
1 Serial network interface(s)
32K bytes of non-volatile configuration memory.
8192K bytes of processor board System flash (Read/Write)

Configuration register is 0x2102


xxxxxxx#sh conf
Using 2739 out of 29688 bytes
! Last configuration change at 22:46:47 METDST Fri Jun 3 2005
! NVRAM config last updated at 22:46:48 METDST Fri Jun 3 2005
version 12.2
service timestamps debug datetime msec localtime
service timestamps log datetime localtime
service password-encryption
hostname xxxxxxx
logging buffered 4096 debugging
enable secret xxxxxxx
enable password xxxxxxx
clock timezone MET 1
clock summer-time METDST recurring last Sun Mar 2:00 last Sun Oct 3:00
ip subnet-zero
no ip domain-lookup
class-map match-all VOICE-xxxxxxx
match access-group name VOICE-xxxxxxx
policy-map VOICE-xxxxxxx
class VOICE-xxxxxxx
priority 900
interface Loopback1
ip address
interface Ethernet0/0
description Lokales Ethernet
ip address secondary
ip address
ip helper-address
random-detect dscp-based
interface Serial0/0
description 2048k Verbindung -> Router xxxxxxx
bandwidth 2048
ip address
service-policy output VOICE-xxxxxxx
interface TokenRing0/0
router ospf 70
passive-interface TokenRing0/0
network area 32
network area 32
network area 32
ip classless
no ip http server
ip access-list extended VOICE-xxxxxxx
permit ip host any
permit ip host any
permit ip host any
permit ip host any
permit ip host any
permit ip host any
permit ip host any
permit ip host any
permit ip host any
permit ip host any
permit ip host any
permit ip host any
snmp-server community xxxxxxxxxxx RO
snmp-server location xxxxxxxxxxx
snmp-server enable traps tty
line con 0
line aux 0
transport input all
line vty 0 4
exec-timeout 30 0
password xxxxxxxxxxxx
ntp clock-period 17180001
ntp server

Reply With Quote

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Need help configuring security and role management settings for website Philipp Lenz ASP .Net 1 12-02-2005 04:04 AM
how to implement RED or WRED Cisco 0 04-05-2005 02:57 AM
Need help configuring router Les Cisco 0 06-24-2004 08:20 PM
Re: Need help configuring cisco 2610xm ibs Cisco 0 04-03-2004 09:57 AM
Need help configuring PIX 501 for proxy arp Bobby Kuzma Cisco 6 12-31-2003 04:42 AM