Port States - Cisco WS-C4507R Troubleshooting Manual
Troubleshooting guide
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Also See for WS-C4507R:
- Configuration manual (612 pages) ,
- Command reference manual (578 pages)
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RST-3508
9805_05_2004_c2
RST-3508
9805_05_2004_c2
© 2004 Cisco Systems, Inc. All rights reserved. Printed in USA.
Presentation_ID.scr
Show Interface Error Counters (Cont.)
Excess-coll
(excessive collisions) is a count of frames for which transmission on a
•
particular port fails due to excessive collisions; an excessive collision happens when a
packet has a collision 16 times in a row; the packet is then dropped; excessive collisions
is typically an indication that the load on the segment needs to be split across multiple
segments but can also point to a duplex mismatch with the attached device; collisions
should not be seen on ports configured as full duplex
Carri-sen
(carrier sense) occurs everytime an Ethernet controller wants to send data on a
•
half duplex connection; the controller senses the wire and check if it is not busy before
transmitting; this is normal on an half-duplex Ethernet segment
Undersize
are frames received that are smaller than the minimum IEEE 802.3 frame size
•
of 64 bytes long (excluding framing bits, but including FCS octets) that were otherwise
well formed; check the device sending out these frames
Runts
are frames received that are smaller than the minimum IEEE 802.3 frame size
•
(64bytes for Ethernet) and with a bad CRC; this can be caused by duplex mismatch and
physical problems like a bad cable, port, or NIC card on the attached device
Giants
exceed the maximum IEEE 802.3 frame size (1518 bytes for non-jumbo Ethernet);
•
try to find the offending device and remove it from the network
http://www.cisco.com/warp/public/473/164.html#show_interface
•
© 2004 Cisco Systems, Inc. All rights reserved.
Useful Port Troubleshooting Commands
for Connectivity
r3_c4k_s2> (enable)
sh port 3
* = Configured MAC Address
Port
Name
Status
----- ------------------ ---------- ---------- ------ ------ ----- ------------
3/1
connected
3/4
notconnect 20
Port States:
1.
Connected:
Operational
2.
Not connected:
Check cables
3.
Faulty:
Use a sh test mod #
4.
Disabled:
Admin down
5.
Inactive:
Typically VLAN doesn't exist
6.
Errdisable:
EtherChannel mismatch; duplex mismatch causing
excessive late collisions; UDLD; BPDU Guard
© 2004 Cisco Systems, Inc. All rights reserved.
(Cat OS)
Vlan
Level
Duplex Speed Type
201
normal
full
normal
auto
49
49
49
100 10/100BaseTX
auto 10/100BaseTX
50
50
50
- Quick Links:
- Cpu Queues
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