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Community Member

3750 Metro Ethernet Rate Limiting Issue


I am having a problem with rate limiting between 2 Cisco 3750 switches. The switch ports are acting as Layer 3 interfaces and i Have throtlled the bandwidth dow to 36MB which is split using CAR. I have allocated 28MB to one accesslist and 8MB to another access list. Once i try flooding the link, the traffic ramps up to 90MB and completetly ignores the rate limiting statements on the interface. Also, packets are not being matched. When i put the exact same config on 2 routers,everything works fine. packets are matched and dropped as expected. Has anyone come across issues with rate limiting on Cisco 3750 switches?

Super Bronze

Re: 3750 Metro Ethernet Rate Limiting Issue

Could you post a show ver and your config?

Community Member

Re: 3750 Metro Ethernet Rate Limiting Issue


I am having a different but could be similar problem.

In order to classify packets through an ACL on a 3750 (IOS 12244SE) I've used everything... (permit any any , permit any any tcp , permit any eq www any etc...) I am not able to match any packet only ICMP traffic is policed and market with the correct values viewed on a sniffer...

I think that the ACL engine on the 3750 is not working properly.

Please , see attaches a sh runn of the partial config related and the view of the unclassified packets at the pcap file.

Any help will be great!!

Thanks in advance to all folks


Super Bronze

Re: 3750 Metro Ethernet Rate Limiting Issue

Suggest you repost this as its own item.

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