FullDuplex on Cisco 2500 Ethernet port?? 1

[seong76]

I'm not sure whether the 10baseT ethernet port on my 2500 router is capable of full duplex. When I go into config int eth, it doesn't even give me fullduplex option. Can someone confirm this for me?

I know my T1 serial interface is capable of full duplex, I'm guessing my ethernet port is a definate bottle neck. Anyone have an idea how much performance I would gain by having full duplex fast ether port?

I'm looking to get most out of what I have, since I'm on a tight budget. I have a 2600 spare unit, will it be wise to pull out the T1 WIC out of my 2500 and use it in my 2600 and buy a fast ethernet module that will connect to my LAN?

Thank you all in advance.
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Cisco Internetwork Operating System Software
IOS (tm) 2500 Software (C2500-I-L), Version 11.2(8), RELEASE SOFTWARE (fc1)
Copyright (c) 1986-1997 by cisco Systems, Inc.
Compiled Tue 05-Aug-97 00:36 by ckralik
Image text-base: 0x030226F0, data-base: 0x00001000

ROM: System Bootstrap, Version 11.0(10c), SOFTWARE
BOOTFLASH: 3000 Bootstrap Software (IGS-BOOT-R), Version 11.0(10c), RELEASE SOFTWARE (fc1)

Ascendent_corp-GW uptime is 32 weeks, 4 days, 2 hours, 40 minutes
System restarted by power-on
System image file is "flash:c2500-i-l.112-8", booted via flash

cisco 2524 (68030) processor (revision J) with 6144K/2048K bytes of memory.
Processor board ID 09306454, with hardware revision 00000000
Bridging software.
X.25 software, Version 2.0, NET2, BFE and GOSIP compliant.
1 Ethernet/IEEE 802.3 interface(s)
2 Serial network interface(s)
FT1 CSU/DSU for Serial Interface 0
No module installed for Serial Interface 1
32K bytes of non-volatile configuration memory.
8192K bytes of processor board System flash (Read ONLY)
Configuration register is 0x2102

-----------------------------------------------------

Ethernet0 is up, line protocol is up
Hardware is Lance, address is 0010.7b36.df45 (bia 0010.7b36.df45)
Description: To Office Ethernet
Internet address is 208.233.84.1/24
MTU 1500 bytes, BW 10000 Kbit, DLY 1000 usec, rely 255/255, load 1/255
Encapsulation ARPA, loopback not set, keepalive set (10 sec)
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:03:26, output 00:00:00, output hang never
Last clearing of "show interface" counters 1d00h
Queueing strategy: fifo
Output queue 0/40, 0 drops; input queue 0/75, 0 drops
5 minute input rate 6000 bits/sec, 8 packets/sec
5 minute output rate 4000 bits/sec, 4 packets/sec
760349 packets input, 124653829 bytes, 0 no buffer
Received 76 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
0 input packets with dribble condition detected
543956 packets output, 113754860 bytes, 0 underruns
0 output errors, 389 collisions, 0 interface resets
0 babbles, 0 late collision, 428 deferred
0 lost carrier, 0 no carrier
0 output buffer failures, 0 output buffers swapped out

 

[JOAMON]

You can set the interface on the 2600 to full duplex but are limited to 10 for speed. NM-1FE 1 port fast ethernet module should do the trick. Could also look at a 1720 as it comes with one fast ethernet port and a slot for your T1 card. Also what type of network gear are you using....fast ethernet port make no difference if patched into a 10base t hub....

 

[seong76]

Cisco ethernet port is connected to a Netscreen 5GT vpn/firewall, which can do 10/100 full duplex. Thanks for the info!

With the fast eth module on the cisco router, does anyone see an issue with having an outside switch infront of my Netscreen firewall? My firewall does have the capability to be configured with DMZ, but it would be nice to have an outside switch (2900xl) to possibly have a restricted guest lan/wifi network.

 

[JOAMON]

Well if you are going to put in a fast ethernet module why no just configure the old port for guest network...different subnet...disable rip...no ip route to production network....should work. Could also setup an access list on ethernet port to deny any access to production network while allowing all other access for added security.

 

[seong76]

Looks like buying a 1720 is a cheaper way to go than buying the fastethernet module for 2600. Thanks for the tip, once again!!

 

[JOAMON]

The flash for these are a little higher than the 2600 as it is a special cisco compact flash. You can also get a wic-1enet for cheap on ebay to add a second enet port.

 

[sbonete]

Hi seong76

I am not sure, but I think that you can run at full duplex with the 2500 if you want. Try to update your ios to a 12.2 or latter one and see.

Cheers.