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Switch 4606

we've a new 4506 swicth in place. Servers are connected to it. Ports are configured as Auto. server shows the connection status as 1 gig. But the communication on 1 gig is very slow. When we change the connection to 100 mbps, the communication gets perfect.

we are using cat 6 cable for the connectivity. Tried all by manaul defining the speed to 1000 full duplex but never worked. Can anyone help on how can i acheive true 1 gig from this swicth.

3 REPLIES
Cisco Employee

Re: Switch 4606

Hi Adil,

What model of gigabit linecard are you using? Also, how densely populated are the ports with devices configured for 1000Mb?

Assuming you have most ports configured for 1000MB, and transmitting at that rate, you will certainly see sluggishness, as none of the gigabit copper linecards for the Cat4500 are fully non-blocking. Most are oversubscribed at a ratio of 8:1, meaning that each block of 8 ports shares 1Gb of bandwidth.

You can verify if you're running into this scenario by testing a device that is on its own block of 8 ports. If the bottleneck is caused by the oversubscription, then a single device on its own block of 8 should be able to get as much throughput as the NIC can handle. Generally, these are in contiguous blocks of 8, but some models may be different. Let me know which module you are dealing with, and I can confirm that for you.

HTH,

Bobby

*Please rate helpful posts.

New Member

Re: Switch 4606

To get a more accurate reading by specifying a shorter period of time (to better detect traffic bursts for example), issue the load-interval interface command.

Also, a port monitor with ethereal will tell the score.

New Member

Re: Switch 4606

hi bobby,

line card is built-in the HP servers...

HP proliat DL380

Card- NC7781

Other tahn this, below is the switch version detail, Pls see if you can help..

core-4506-1#show ve

core-4506-1#show version

Cisco Internetwork Operating System Software

IOS (tm) Catalyst 4000 L3 Switch Software (cat4000-I9S-M), Version 12.2(20)EW, E

ARLY DEPLOYMENT RELEASE SOFTWARE (fc1)

Technical Support: http://www.cisco.com/techsupport

Copyright (c) 1986-2004 by cisco Systems, Inc.

Compiled Wed 02-Jun-04 18:48 by hqluong

Image text-base: 0x00000000, data-base: 0x011F88F4

ROM: 12.1(20r)EW1

Dagobah Revision 93, Swamp Revision 6

core-4506-1 uptime is 27 weeks, 2 days, 3 hours, 15 minutes

System returned to ROM by reload

System restarted at 13:33:26 UTC Tue Oct 25 2005

System image file is "bootflash:"

cisco WS-C4506 (MPC8245) processor (revision 8) with 524288K bytes of memory.

Processor board ID FOX085103J0

MPC8245 CPU at 400Mhz, Supervisor V

Last reset from Reload

2 Virtual Ethernet/IEEE 802.3 interface(s)

98 Gigabit Ethernet/IEEE 802.3 interface(s)

511K bytes of non-volatile configuration memory.

Configuration register is 0x2101

waiting 4 ur feedback

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