Re: Cisco 2621 opinions

[Brian Ford <brford () cisco com>]

Patrick,

I would disagree with your assessment of an "extensive rule set".  The IOS 
Firewall is completely Stateful for TCP; builds state for UDP connections; 
offers all the IOS ACLs (Standard, Extended, Reflexive, Dynamic and Time of 
Day); as well as ICMP filtering.  You have extensive IOS Syslog 
capabilities.  You have access to all the IOS QOS mechanisms.  If you are 
reasonable in your use of the state mechanisms you can usually achieve (at 
least a little) better performance.  So you balance the use of traditional 
ACLs and IP audit capability.

I've found that 3 Mbps throughput is usually fine considering that's using 
a router between a T-1 line and an Ethernet network.  No?

If you had multiple serial connections coming in or if this were an 
Ethernet to Ethernet connection you could look at the 2651 or the 3600s.

Liberty for All,

Brian

At 12:00 PM 7/16/2002 -0400, you wrote:
> Date: Mon, 15 Jul 2002 11:12:47 -0400 (EDT)
> From: Patrick Darden <darden () armc org>
> To: firewall-wizards () nfr net
> Subject: Re: [fw-wiz] Cisco 2621 opinions
>
>
> Joe,
>
> The 2621 series can handle, in fast-switching mode, 25kpps.  If simple
> packet filtering is in place, half that.  If you are using IPFW IOS then
> half that.  If you are using extensive rule sets, then half that.
>
> Let's say you get about 6kpps.  A standard packet is 64 bytes, so
> 6000X64==384KBps.  This is equivalent to 3mbps.  Not even ethernet speed.
> And this is without an extensive rule set.
>
> Even with no filtering, max routing in fast-switching mode is about
> 12mbps.  With CBAC and extensive lists, this could go down to 1.5mpbs.
>
> ymmv.
>
> --
> --Patrick Darden                Internetworking Manager
> --                              706.475.3312    darden () armc org
> --                              Athens Regional Medical Center

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