RE: CIsco 7206VXR w/NPE-G1 Question
Does anyone have definitive speed results on the 3 "built-in" Gig ports on the NPE-G1? I know that they aren't attached to the PCI Buses, and don't consume bandwidth points, but all of that is mute. Can all three of the ports do line rate Gig? The Gig PA is limited to 400Mbps. I have seen posts that allude to the fact the max throughput on the 3 Gigs are 800Mbps. It's is like a big mystery that cannot be solved. With a "J" M7i, I know I'm going to get line rate per port up to the total forwarding capacity of the FPC. We are trying to create a comparison matrix and any info you have would be great. Jack -----Original Message----- From: owner-nanog@merit.edu [mailto:owner-nanog@merit.edu] On Behalf Of Simon Hamilton-Wilkes Sent: Friday, January 30, 2004 9:36 AM To: nanog@merit.edu Subject: RE: CIsco 7206VXR w/NPE-G1 Question One more interesting feature - if you need a 4th GigE port, you can add the GigE I/O card which still uses none of the bus bandwidth points. The buses are fine for OC3 and below... Simon ****************************************************************************************** The information contained in this message, including attachments, may contain privileged or confidential information that is intended to be delivered only to the person identified above. If you are not the intended recipient, or the person responsible for delivering this message to the intended recipient, ALLTEL requests that you immediately notify the sender and asks that you do not read the message or its attachments, and that you delete them without copying or sending them to anyone else.
Keep in mind, 72xx is still flow-based, so you need to count *both* shared fabric capacity (aka PCI buses) and capacity of NPE to establish flows (aka pps rate). NPE-G1 might probably route 3*GE, without any services and if all 3GE are in a single flow, but will melt down at a face of one-packet-per-flow DDoS (read: "Nachi" worm) at a far lower rate (I'd be surprised if it sustains 200kpps DDoS traffic, which can be as low as 150Mbit bandwidth). That is of course, as opposed to Juniper, which is truly line-rate at any interface, with any services, at any composition of traffic. -alex On Fri, 30 Jan 2004 Jack.W.Parks@alltel.com wrote:
Does anyone have definitive speed results on the 3 "built-in" Gig ports on the NPE-G1? I know that they aren't attached to the PCI Buses, and don't consume bandwidth points, but all of that is mute. Can all three of the ports do line rate Gig? The Gig PA is limited to 400Mbps. I have seen posts that allude to the fact the max throughput on the 3 Gigs are 800Mbps. It's is like a big mystery that cannot be solved. With a "J" M7i, I know I'm going to get line rate per port up to the total forwarding capacity of the FPC.
We are trying to create a comparison matrix and any info you have would be great.
Jack
-----Original Message----- From: owner-nanog@merit.edu [mailto:owner-nanog@merit.edu] On Behalf Of Simon Hamilton-Wilkes Sent: Friday, January 30, 2004 9:36 AM To: nanog@merit.edu Subject: RE: CIsco 7206VXR w/NPE-G1 Question
One more interesting feature - if you need a 4th GigE port, you can add the GigE I/O card which still uses none of the bus bandwidth points. The buses are fine for OC3 and below...
Simon
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... That is of course, as opposed to Juniper, which is truly line-rate at any interface, with any services, at any composition of traffic.
No. While I was at my former employer, we took our edge ACL into the Juniper POC lab, and verified that an M40 stuffed full of OC48 linecards could sustain just over 85% of line rate with our edge ACL applied before sustaining packet loss; the POC lab engineers double checked and verified that there was nothing wrong with the test, that was simply the most the IPII processors could handle with that particularly hairy ACL. There's no such thing as a perfect router--there will always be conditions under which any given device has suboptimal (read "sub-line-rate") performance. The trick is establishing what traffic patterns show up in *your* network, and purchase the appropriate hardware for _your_ traffic patterns.
-alex
Matt
No. While I was at my former employer, we took our edge ACL into the Juniper POC lab, and verified that an M40 stuffed full of OC48 linecards could sustain just over 85% of line rate with our edge ACL applied before sustaining packet loss; the POC lab engineers double checked and verified that there was nothing wrong with the test, that was simply the most the IPII processors could handle with that particularly hairy ACL.
Was that in the limits of the FPC ? It seems it does, just checking out. Was this a test with smallest possible packets ? Do you remember aggregate pps being routed ? It seems you could hit some of the real IP2 pps limits with ACLs, which is definitively not 40 Mpps. In one test I saw it hitted top at 12.5 Mpps, but it may be due to hitting FPC limits. Other people tests showed something in the 20-25 Mpps range. Rubens
participants (4)
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alex＠pilosoft.com -
Jack.W.Parks＠alltel.com -
matt＠petach.org -
Rubens Kuhl Jr.