Hey Dave - Thanks!
I've learned a bit from my personal experience configuring this setup.
I'll reply to my own thread. Hopefully it can help some other folks.
Some definitions:
Downstream: Traffic to me, from my ISP
Upstream: Traffic from me, to my ISP
E0/0: Internal (Protected Net)
E0/1: External (PPPoE) to external ADSL Modem
Lessons learned:
1. It has been said before, and I'll second the motion - don't bother
trying to shape inbound traffic. By the time you have the traffic -
it's too late. Resolution to this, try not to over-subscribe your
inbound bandwidth.
2. I didn't have much success with "policy maps". I -think- the reason
for this is there is actually no bandwidth capacity assigned to a dialer
interface, hence there is no way to guarantee a reservation of the
total capacity. (maybe a cisco geek can confirm).
3. The only QoS settings that I actually used were "traffic policing".
My internet connection upstream bandwidth is about .67 Mb/s (or
~686Kb/s) on my adsl circuit. According to Voip-Info.org
http://www.voip-info.org/wiki/view/ITU+G.711 , g711u is approximately
84Kb/s (I think this is about 42Kb/s in each direction). I wanted to
reserve enough bandwidth for two g711u upstream calls to my VoIP
provider, so I reserved about 90Kb/s. I used the following police and
access-lists. You will notice I have applied this to E0/0, and not E0/1
(or the Dialer1 interface). I need to revisit this at some point and
see it I can apply it to the Dialer1 interface. My access-list rule is
pretty crude, but IAX2 (and sometimes SIP) are the only UDP flows that
are really worth mentioning that pass through my router, excluding DNS
which is really pretty lightweight for the most part. I wanted to do an
initial setup with minimal rules, and do the fine tuning from there.
policy-map tcppolice
class acgroup110
police 588000 2000 4000 conform-action transmit exceed-action
set-qos-transmit 4 violate-action drop
interface Ethernet0/0
description LAN
ip address 192.168.0.1 255.255.255.0
ip nat inside
service-policy input tcppolice
access-list 110 permit tcp any any
There may be more efficient ways to do this, but at this point, I am
completely happy with the QoS configuration on the Cisco 2600.
If anyone has any other suggestions or ideas, I'd love to hear about
them too.
/M
On 8/5/2010 5:11 PM, Dave Donovan wrote:
Hi Mark,
I thought I'd give your thread a bump. Did you get a response on
this, it looks like a good question.
I wonder if Lloyd or any of our other Cisco wizards are tuned in and
might be able to shed some light on the subject.
Dave
On Sat, Jul 31, 2010 at 6:19 PM, Mark Brown<[email protected]> wrote:
Hi Taugers!
I'm a bit of a cisco newb, and I was wondering if someone here could smack
me around with a cisco clue stick :-)
I'm in the midst of trying to prioritize my IAX2 connections, and have the
rest of my connections do fair-queue.
I found the following on http://www.voip-info.org/wiki/view/QoS+Cisco
(below). This is for the use-case with a ADSL WIC installed. (hence the ATM
interface in the example)
I am connecting a ADSL modem to a Cisco 2611, and running a PPPoE client on
the route which is similar, however I'm not sure where to apply the outbound
service-policy.
I figure it doesn't make sense to connect it to int eth 0/1, which is PPPoE
to the modem. I don't think it makes sense to apply it to the Dialer1
interface.
Virtual-Access, Virtual-Template - can someone clear some confusion for me
please - thanks!
I'm using IOS 12.3(26).
/Mark
-------
class-map match-any signaling
match access-group 102
class-map match-any voice
match access-group 101
policy-map VoicePolicy
class voice
priority 384
class signaling
priority 128
class class-default
fair-queue
interface ATM0/0/0
no ip address
no atm ilmi-keepalive
bundle-enable
dsl operating-mode auto
pvc 0/35
vbr-nrt 768 768
tx-ring-limit 3
service-policy output VoicePolicy
pppoe-client dial-pool-number 1
interface Dialer0
ip unnumbered FastEthernet0/0
no ip redirects
no ip unreachables
ip mtu 1492
encapsulation ppp
no ip route-cache cef
no ip route-cache
ip tcp adjust-mss 1452
no ip mroute-cache
dialer pool 1
no cdp enable
ppp authentication pap chap callin
ppp pap sent-username<your PPPoE Username> password 0<Your
PPPoE Password>
access-list 101 remark ***QoS for RTP and IAX***
access-list 101 permit udp any any dscp ef
access-list 102 remark ***QOS for SIP***
access-list 102 permit udp any any dscp af41
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