From: Dan (dp595@xxxxxxxxxxxxx)
Date: Mon Feb 26 2001 - 17:14:11 GMT-3
This switch is at one of our datacenters and we have customers on the
FastEthernet Ports.
This switch is set up exactly like a router. Routing with OSPF and BGP. No
Vlans defined (except for the default Vlan1 with Interface Vlan 1 shutdown),
IP addresses on physical FastEthernet interfaces.
Well I had set up the rate-limiting like this, but I wasn't sure:
#sh ru int f8/3
Building configuration...
Current configuration:
!
interface FastEthernet8/3
description 1 MB Customer Burstable to 10MB
ip address x.x.x.x x.x.x.x
rate-limit input 1000000 1125000 1125000 conform-action transmit
exceed-action drop
rate-limit output 1000000 1125000 1125000 conform-action transmit
exceed-action drop
no cdp enable
It seemed to take, but I haven't plugged in yet and tested. Just going
through the preliminary.
#sh int f8/3 rate-limit
FastEthernet8/3
Input
matches: all traffic
params: 1000000 bps, 1125000 limit, 1125000 extended limit
conformed 0 packets, 0 bytes; action: transmit
exceeded 0 packets, 0 bytes; action: drop
last packet: 2392521644ms ago, current burst: 0 bytes
last cleared 01:42:55 ago, conformed 0 bps, exceeded 0 bps
Output
matches: all traffic
params: 1000000 bps, 1125000 limit, 1125000 extended limit
conformed 0 packets, 0 bytes; action: transmit
exceeded 0 packets, 0 bytes; action: drop
last packet: 2392521644ms ago, current burst: 0 bytes
last cleared 01:42:39 ago, conformed 0 bps, exceeded 0 bps
This Supervisor seems to support this:
#show module
Slot Ports Card Type Model
Serial Number
---- ----- ----------------------------------------- --------------------- -
------------
1 2 Cat 6000 sup 1 Enhanced QoS (active) WS-X6K-SUP1A-2GE
SAD04450AXT
8 48 48 port 10/100 mb RJ45 WS-X6348-RJ-45
SAL04401A55
9 48 48 port 10/100 mb RJ45 WS-X6348-RJ-45 S
AL04401ANL
I am obviously not familiar with Cat6K.
Dan Pontrelli
Customer Installation Engineer - Verio NYC
CCNP, MCSE, CNA
----- Original Message -----
From: "Daniel Shin" <dshin@cisco.com>
To: <dshin@cisco.com>; <ccielab@groupstudy.com>; <dp595@optonline.net>
Sent: Monday, February 26, 2001 2:02 PM
Subject: Re: Rate-limiting on Cat6K (off topic)
> The first value is the actual rate limit. Second value is what you allow
them
> to burst up to. And the third one is if there is a credit from previous
second,
> then how much more would you allow them to burst. All the values added
together
> is your total car.
>
> However, going back to the first question, Catalysts do not support CAR.
They
> have vlan interfaces that are (literally virtual interface and there is no
> physical port associated with them). When a train of packets arrive, the
first
> packet will go through the vlan interface to be routed and the rest of
packets
> get fastswitched at the wire rate on the switch. That's why the catalysts
can
> route packets so much faster than 7500 or 7200 due to that architecture.
They
> literally switch packets at a wire rate (the same switching as a layer 2).
>
> Downside is that the vlan never sees the full traffic going through. So
CAR is
> not possible on a catalyst because it will never reach the rate-limit to
be
> discarded.
>
>
>
>
> > From dp595@optonline.net Mon Feb 26 10:40:48 2001
> > Date: Mon, 26 Feb 2001 13:40:03 -0500
> > From: Dan <dp595@optonline.net>
> > Subject: Re: Rate-limiting on Cat6K (off topic)
> > To: Daniel Shin <dshin@cisco.com>, ccielab@groupstudy.com
> > MIME-version: 1.0
> > X-MIMEOLE: Produced By Microsoft MimeOLE V5.50.4133.2400
> > Content-transfer-encoding: 7BIT
> > X-Priority: 3
> > X-MSMail-priority: Normal
> >
> > 6509 Running IOS, and I think I had the burst rates wrong in my example
> > below. I want 9MB of burst, therefore 1125000 bytes of burst (not
1250000).
> > Am I using the correct logic here?
> >
> > Dan Pontrelli
> > Customer Installation Engineer - Verio NYC
> > CCNP, MCSE, CNA
> >
> > ----- Original Message -----
> > From: "Daniel Shin" <dshin@cisco.com>
> > To: <ccielab@groupstudy.com>; <dp595@optonline.net>
> > Sent: Monday, February 26, 2001 1:12 PM
> > Subject: Re: Rate-limiting on Cat6K (off topic)
> >
> >
> > > Are you running hybrid or native IOS?
> > >
> > > Answers embedded...
> > >
> > >
> > > > From nobody@groupstudy.com Mon Feb 26 09:25:22 2001
> > > > Date: Mon, 26 Feb 2001 12:18:16 -0500
> > > > From: Dan <dp595@optonline.net>
> > > > Subject: Rate-limiting on Cat6K (off topic)
> > > > To: ccielab@groupstudy.com
> > > > X-MIMEOLE: Produced By Microsoft MimeOLE V5.50.4133.2400
> > > > X-Priority: 3
> > > > X-MSMail-priority: Normal
> > > >
> > >
> > > CAR is not supported due to achitecture of catalysts.
> > >
> > > > I am trying to rate-limit a connection on a Cat6K FastEthernet
port.
> > > > I want 1MB bandwidth burstable to 10MB. I looked at the Cisco
website
> > and I
> > > > think the following would do the trick:
> > > >
> > > > rate-limit input 1000000 1250000 1250000 conform-action transmit
> > > > exceed-action drop
> > > > rate-limit output 1000000 1250000 1250000 conform-action transmit
> > > > exceed-action drop
> > > >
> > > > Is this correct? I'm still having trouble understanding why 2 burst
> > rates
> > > > (normal and maximum) need to be specified.
> > > >
> > >
> > > If you don't, you will end up rate-limiting more traffic than
intended.
> > Think
> > > about the traffic pattern. It bursts up and down - especially FTP.
> > >
> > > > Thanks in advance for any input.
> > > >
> > > >
> > > > Dan Pontrelli
> > > > Customer Installation Engineer - Verio NYC
> > > > CCNP, MCSE, CNA
> > > >
> > > >
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