Hi All, we have a Cisco 3825 router which does not work well with a DSL modem(ISP provided). I have configured the Gi0/0 port of the router to plug into this DSL modem but it does not ping to the ISP gateway. If we do a shut/no shut on the interface then it work fine for about 30 secs. Sometimes even for 1 hr. Then the packets drop and we cannot pass any traffic through this interface.
Now, if the ISP connection is terminated on a computer it works fine. It works fine without dropping any packet.
I have tried various options like using a straight/cross cable. I have tried to configure the interface negotiation for 100/full, 100/half, auto/auto and almost all the options.
I have also tried to interconnect the devices using a L2 device like a HUB. Nothing works.
Any recomendation on this? Has anyone seen this kind of a behavior?
I have done that, checked even with a different router, switch, fast ethernet and Gi eth interfaces. It does not work.
With a PC it works. !!! this looks like there is some compatibility issues between the ISP modem and Cisco devices.
here goes the full sh ver:
Cisco IOS Software, 3800 Software (C3825-ADVIPSERVICESK9-M), Version 12.4(15)T6,
RELEASE SOFTWARE (fc2)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2008 by Cisco Systems, Inc.
Compiled Mon 07-Jul-08 13:37 by prod_rel_team
ROM: System Bootstrap, Version 12.4(13r)T, RELEASE SOFTWARE (fc1)
rtr-vpn-kor-seo uptime is 1 hour, 48 minutes
System returned to ROM by power-on
System image file is "flash:c3825-advipservicesk9-mz.124-15.T6.bin"
This product contains cryptographic features and is subject to United
States and local country laws governing import, export, transfer and
use. Delivery of Cisco cryptographic products does not imply
third-party authority to import, export, distribute or use encryption.
Importers, exporters, distributors and users are responsible for
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Cisco 3825 (revision 1.1) with 223232K/38912K bytes of memory.
Processor board ID FTX1101A1RL
2 FastEthernet interfaces
2 Gigabit Ethernet interfaces
1 terminal line
1 Virtual Private Network (VPN) Module
1 cisco content engine(s)
DRAM configuration is 64 bits wide with parity enabled.
479K bytes of NVRAM.
62720K bytes of ATA System CompactFlash (Read/Write)
Configuration register is 0x2102
show run int gig0/0
show int gig0/0
show run | in ip route
and what the settings we have on modem side for speed?hardcode or nego..?