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?
Here is the router config for the interface:
rtr-vpn-kor-seo#sh run in gi0/0
Current configuration : 194 bytes
description *** DMVPN ***
ip address a.b.c.d 255.255.255.0
ip access-group dmvpn-acl in
rtr-vpn-kor-seo#sh int gi0/0
GigabitEthernet0/0 is up, line protocol is up
Hardware is BCM1125 Internal MAC, address is 001a.2ff0.d6a0 (bia 001a.2ff0.d6a
Description: *** DMVPN ***
Internet address is a.b.c.d/24
MTU 1500 bytes, BW 100000 Kbit/sec, DLY 100 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 100Mb/s, media type is RJ45
output flow-control is XON, input flow-control is XON
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:00, output 00:00:00, output hang never
Last clearing of "show interface" counters never
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
30 second input rate 3000 bits/sec, 9 packets/sec
30 second output rate 0 bits/sec, 0 packets/sec
2319804 packets input, 143504593 bytes, 0 no buffer
Received 2282106 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 412948 multicast, 0 pause input
0 input packets with dribble condition detected
82646 packets output, 9132275 bytes, 0 underruns
3 output errors, 0 collisions, 4 interface resets
17813 unknown protocol drops
0 babbles, 0 late collision, 0 deferred
3 lost carrier, 0 no carrier, 0 pause output
0 output buffer failures, 0 output buffers swapped out