wolf2008
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PPP Connection recieving collision errors...
Experts,
Sorry if this is very vague.
We have a PPP connection between are campuses. The network is running but is recieving collision errors on both uplinks to the routers. The duplex and speed to set to auto, and gets half/10MB's. (There is a 10MB line between the buildings.)
When I hardcode the speed/duplex to half/10MB. The interfaces shut down and there is no activity at all.
Both routers are managed thru are ISP.
What is most likely the issue? Thanks!
Sorry if this is very vague.
We have a PPP connection between are campuses. The network is running but is recieving collision errors on both uplinks to the routers. The duplex and speed to set to auto, and gets half/10MB's. (There is a 10MB line between the buildings.)
When I hardcode the speed/duplex to half/10MB. The interfaces shut down and there is no activity at all.
Both routers are managed thru are ISP.
What is most likely the issue? Thanks!
ASKER
ISP verify router configs as full and 10MB. However, when I hardcode that the port shuts down.
This is a brand new connection.
What is a simplex mismatch?
FastEthernet0/47 is up, line protocol is up (connected)
Hardware is Fast Ethernet, address is 0022.0c4a.ea33 (bia 0022.0c4a.ea33)
Description: (To Cisco 3400 Router port 1)
MTU 1500 bytes, BW 10000 Kbit, DLY 1000 usec,
reliability 255/255, txload 1/255, rxload 3/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Half-duplex, 10Mb/s, media type is 10/100BaseTX
input flow-control is off, output flow-control is unsupported
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:00, output 00:00:01, 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)
5 minute input rate 126000 bits/sec, 2 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
9986392 packets input, 8099764936 bytes, 0 no buffer
Received 1296339 broadcasts (907560 multicasts)
0 runts, 0 giants, 0 throttles
1 input errors, 1 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 907561 multicast, 0 pause input
0 input packets with dribble condition detected
10582982 packets output, 5333970718 bytes, 0 underruns
0 output errors, 368142 collisions, 1 interface resets
0 babbles, 75356 late collision, 0 deferred
0 lost carrier, 0 no carrier, 0 PAUSE output
0 output buffer failures, 0 output buffers swapped out
This is a brand new connection.
What is a simplex mismatch?
FastEthernet0/47 is up, line protocol is up (connected)
Hardware is Fast Ethernet, address is 0022.0c4a.ea33 (bia 0022.0c4a.ea33)
Description: (To Cisco 3400 Router port 1)
MTU 1500 bytes, BW 10000 Kbit, DLY 1000 usec,
reliability 255/255, txload 1/255, rxload 3/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Half-duplex, 10Mb/s, media type is 10/100BaseTX
input flow-control is off, output flow-control is unsupported
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:00, output 00:00:01, 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)
5 minute input rate 126000 bits/sec, 2 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
9986392 packets input, 8099764936 bytes, 0 no buffer
Received 1296339 broadcasts (907560 multicasts)
0 runts, 0 giants, 0 throttles
1 input errors, 1 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 907561 multicast, 0 pause input
0 input packets with dribble condition detected
10582982 packets output, 5333970718 bytes, 0 underruns
0 output errors, 368142 collisions, 1 interface resets
0 babbles, 75356 late collision, 0 deferred
0 lost carrier, 0 no carrier, 0 PAUSE output
0 output buffer failures, 0 output buffers swapped out
Meaning Half/Full duplex. When one device is set to full and the other is set to half, you will always get collsions. If this is a new "Link", there is obviously an issue here somewhere and it may be "physical".
IE: cabling, etc.
1) Try setting your fastethernet interfaces to Full Duplex, speed of 10Mb or 10000
2) Ensure you have good cabling in place and connections are "snug"
3) reset your interface counters and see if the errors increment.
Let us know.
IE: cabling, etc.
1) Try setting your fastethernet interfaces to Full Duplex, speed of 10Mb or 10000
2) Ensure you have good cabling in place and connections are "snug"
3) reset your interface counters and see if the errors increment.
Let us know.
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ASKER
Ok. So the ISP confirmed Full & 10MB.
However, the switch uplink is set to (Auto for both) and detects Half & 10MB. Which is why we are having collisons.
When I go to hardcode the Full duplex the interface does down, & down. Even if I hardcode just 10MB the interface goes down, down.
So I'm correct in assuming that the ISP router config is setup to Duplex Auto, Speed Auto ?
The cable is a 5ft, Cat5e straight cable.
However, the switch uplink is set to (Auto for both) and detects Half & 10MB. Which is why we are having collisons.
When I go to hardcode the Full duplex the interface does down, & down. Even if I hardcode just 10MB the interface goes down, down.
So I'm correct in assuming that the ISP router config is setup to Duplex Auto, Speed Auto ?
The cable is a 5ft, Cat5e straight cable.
If they are hard coded to 10Mb Full Duplex, then thats what you should be connecting @....If you're setting your equipment to "Auto Negotiate" and they only connect @ 10Mb Half-duplex? Well, there's obviously an issue somewhere. How long are you giving your changes after hard-coding your uplink interface info to 10Mb Full before you have to change it back?
ASKER
Yeah, we have connectivity with the auto/auto (half/10MB).
I gave it 2 mins. Both interfaces showed no connectivity. Should I wait longer?
I gave it 2 mins. Both interfaces showed no connectivity. Should I wait longer?
I know it "should" come back faster than 2mins, but give it 5mins ...Also, how long is this cable run for the new "link"? Is the cabling new too or was this an existing cable?
ASKER
Its a new fiber connection between the buildings. I doubt its a layer 1 issues as we do have connectivity between the buildings... It's just dirty connectivity.
ASKER
The Cisco 3400 ME is a layer 3 switch and needs a cross-over connected to the Cisco 3560 switch. Hardcoded 10MB/Full no more collisions!!!
If this issue just started, you may have a problem w/ either the cabling or an interface that links the two buildings. You may want to contact your service provider and go over the link settings and speeds, etc with them to ensure they match accordingly.