also , become familiar with other implications when "bandwidth" is used :-)
Hint: people configure QOS after routing protocol. :-)
Date: Thu, 13 Aug 2009 19:53:01 -0400
From: [email protected]
To: [email protected]
CC: [email protected]
Subject: Re: [OSL | CCIE_RS] QoS & Max-reserve-bandwidth
It's not necessarily a bad thing at all. In fact, it is quite a useful command
much of the time. If the task said to configure such and such percent of the
bandwidth I would first set the bandwidth to the line speed using the bandwidth
command. Then, I would set Max-reserved-bandwidth to 100 to make the math
easier. If you do "bandwidth-percent 20" with the default
"max-reserved-bandwidth 75" what you are getting is actually 20% of 75% ...to
me that is more difficult. If you set max-reserved bandwidth to 100, you
actually get 20% of the entire interface bandwidth.
On Thu, Aug 13, 2009 at 7:30 PM, Michael Lipsey <[email protected]> wrote:
Changing this is bad right?
I was working on Lab 3 in V2 of the BLS and I know they show doing task 8.1
with a queue-list but I wanted to try it differently.
I did it in MQC:
class-map match-all TELNET
match protocol telnet
class-map match-all HTTP
match protocol http
class-map match-all FTP
match protocol ftp
class-map match-all iIPV6
match protocol ipv6
!
!
policy-map Bandwidth
class HTTP
bandwidth percent 20
class FTP
bandwidth percent 20
class IPV6
bandwidth percent 25
class TELNET
bandwidth percent 15
Now, this works if you stick to the idea of ‘available bandwidth’ vs
‘linespeed’. If it said set so-and-so to ‘20% of line speed’ I would use a
queue-list I guess and not mess with max-reserver-bandwidth. But it says
‘bandwidth’ so if I use mqc with this config on a 128k circuit I don’t end up
with enough available bandwidth to do it unless I mess with m-r-b. What’s the
difference if I do? Queue-list don’t care so they don’t reserver m-r-b for
class default but MQC does.
Also there is a lingering question I have: is a queue-list bidirectional? A
service-policy would need to be applied inbound and outbound no? (It’s too late
in the game for me to be asking these dumb questions)
So finally, this is what I ended up with:
class-map match-all TELNET
match protocol telnet
class-map match-all HTTP
match protocol http
class-map match-all FTP
match protocol ftp
class-map match-all iIPV6
match protocol ipv6
!
!
policy-map Bandwidth
class HTTP
bandwidth percent 20
class FTP
bandwidth percent 20
class IPV6
bandwidth percent 25
class TELNET
bandwidth percent 15
interface Multilink1
ip address 110.99.96.5 255.255.255.252
ip bandwidth-percent eigrp 100 15
ip pim sparse-mode
ip summary-address eigrp 100 4.0.0.0 254.0.0.0 5 leak-map 4and5
ppp multilink
ppp multilink links minimum 2 mandatory
ppp multilink group 1
max-reserved-bandwidth 100
service-policy output Bandwidth
end
Thanks guys
-Mike
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--
Regards,
Joe Astorino - CCIE #24347 R&S
Technical Instructor - IPexpert, Inc.
Cell: +1.586.212.6107
Fax: +1.810.454.0130
Mailto: [email protected]
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