Re: Rate-limit on 3750 & BGP

Manoj,

You can change the SDM template to "aggregator routing" in order to allocate
more resources for unicast routing. This would allow 14k unicast routes and
6k directly connected hosts. Please take a look at the following URL for
information on SDM templates.

http://www.cisco.com/en/US/docs/switches/lan/catalyst3750/software/release/12.2_35_se/configuration/guide/swsdm.html#wp1100461

  And for QoS issue, Ruchir gave you a good script.
~ Moazzam

-- 
Regards,
Syed Moazzam Daimi
CCIE # 22100
On Wed, Nov 18, 2009 at 12:12 PM, Ruchir Jain (rucjain)
<rucjain_at_cisco.com>wrote:
> Dear Manoj,
>
> Rate limit command is not supported for hardware switched traffic on
> Cisco switches. You might consider using MQC QOS features to achieve the
> same. You could police the inbound traffic on a 3750 switch but not the
> outbound traffic. To rate limit the outbound traffic you might consider
> a workaround where you would map the FTP traffic to a separate hardware
> queue and then shape that hardware queue at appropriate bandwidth.
>
> Here is a sample config that might help for inbound policing:
>
> access-list 100 permit tcp any any eq ftp
> !
> Class-map FTP
>  Match access-group 100
> !
> Policy-map FTP
>  Class FTP
>  police 512000000 102400 exceed-action drop
> !
> Interface g0/1
>  Service-policy input FTP
> !
>
>
> Regarding the number of BGP routes on 3750, the limitation is on the
> number of routes that can be forwarded in hardware. There is limited
> TCAM space in the 3750, with the "aggregator default" SDM template you
> are limited to 12k unicast routes. This is further broken down into
> directly connected hosts and indirect routes
> with an allocation of 6k for each. Once TCAM resources are exhausted the
> switch will have to perform forwarding in software and this can have
> amajor performance impact including packet loss and loss of routing
> protocol adjacencies.
>
> Thanks and regards,
>
> Ruchir
>
> -----Original Message-----
> From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of
> manoj prajapati
> Sent: Wednesday, November 18, 2009 11:57 AM
> To: Cisco certification; cisco_at_groupstudy.com
> Subject: Rate-limit on 3750 & BGP
>
> Hi,
>
>   I have enable Rate-limit on  CISCO 3750 switch to limit the bandwidth
> 512k for FTP traffic
> Below is the configuration.
>
> int g1/0
> rate-limit input access-group 100 512000 1024000 2048000 conform-action
> transmit exceed-action drop
> rate-limit output access-group 100 512000 1024000 2048000 conform-action
> transmit exceed-action drop
>
> access-list 100 permit tcp any any eq ftp
>
> After enabling the rate-limit on the switch. I am not able to get any
> difference with rate-limit (there is no hitcount on the ACL). Is there
> anything i am missing ??
>
> 1 more question how many BGP routes can 3750 supports ?
>
> Regards,
> Manoj
>
>
> Blogs and organic groups at http://www.ccie.net
>
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html
>
>
> Blogs and organic groups at http://www.ccie.net
>
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html
Blogs and organic groups at http://www.ccie.net