7201 Port Adapter slot speed?

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Sep 10th, 2009
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Does anyone know where to find the throughput capabilities of a 7201's port adapter slot?


For instance, I have a PA-GE card installed in slot 1 of a 7201 router and seem to have trouble getting past about 450 Mbps through it. I recall that I've seen the capability documented before, but can no longer find it.


The router has no QoS configured, and the CPU is running at <20%.


Thanks!



Correct Answer by paolo bevilacqua about 7 years 10 months ago

That is about right, PA-GE cannot do more of 450 mbps onany platform. It's just a old PCI bus after all.

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Leo Laohoo Thu, 09/10/2009 - 22:11
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Are you using an NPE-G1 card?

Giuseppe Larosa Fri, 09/11/2009 - 03:11
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Hello Shawn,

I got far lower numbers with GEIP+ on old C7500.


I think this performance is what you can expect from device.

The I/O controller when it is a standalone linecard (before NPE-G1 or NPE-G2) has two PCI buses one for even and one for odd slots.

To one of them are also connected the FE ports of the I/O controller itself (if present).


With NPE-G1 or NPE-G2 you can gain better performance if using one of the 3GE ports that are built on the NPE itself.

With a PA GE even with an NPE-G1 or NPE-G2 you go though PCI bus and you should get similar figures.


Hope to help

Giuseppe


Joseph W. Doherty Fri, 09/11/2009 - 04:03
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Can't find a hard performance number, but within http://www.cisco.com/en/US/products/hw/modules/ps2033/products_data_sheet09186a0080091ce7.html we find:


"Single Port Gigabit Ethernet Port Adapter (PA-GE)


The single port Gigabit Ethernet Port Adapter (PA-GE) provides a Gigabit Ethernet connection for the Cisco 7200 and Cisco 7304 series routers. This port adapter (PA), which offers moderate performance, is suitable for campus, enterprise edge and wide-area network (WAN) aggregation applications. . . ."


What I've underlined could imply the card is not capable of wire rate.

Correct Answer
paolo bevilacqua Fri, 09/11/2009 - 04:18
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That is about right, PA-GE cannot do more of 450 mbps onany platform. It's just a old PCI bus after all.

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