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Errors on Interface Vlan 1 on Catalyst 2950

I am getting an awful lot of errors on interface vlan 1 on my Catalyst 2950's

Anyone have any idea what can cause this ?

sh interfaces vlan 1 Vlan1 is up, line protocol is up Hardware is CPU Interface, address is 0012.43a0.fb40 (bia 0012.43a0.fb40) Internet address is 172.16.253.1/16 MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec, reliability 247/255, txload 1/255, rxload 1/255 Encapsulation ARPA, loopback not set ARP type: ARPA, ARP Timeout 04:00:00 Last input 00:00:00, output never, output hang never Last clearing of "show interface" counters 00:20:30 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 0 bits/sec, 0 packets/sec 5 minute output rate 94000 bits/sec, 27 packets/sec 2304 packets input, 111233 bytes, 0 no buffer Received 501 broadcasts (0 IP multicast) 0 runts, 0 giants, 0 throttles 1230 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored 34012 packets output, 7282722 bytes, 0 underruns 0 output errors, 0 interface resets 0 output buffer failures, 0 output buffers swapped out

Reply to
Aharon Schkolnik
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Reply to
leontaylor

post show version show cdp nei det show int trunk

Reply to
Merv

The information follows.

May I ask what you are looking for in show int trunk ? Perhaps this will give me a direction to follow.

TIA !

UpperSwitch#show vers Cisco Internetwork Operating System Software IOS (tm) C2950 Software (C2950-I6Q4L2-M), Version 12.1(22)EA1, RELEASE SOFTWARE (fc1) Copyright (c) 1986-2004 by cisco Systems, Inc. Compiled Mon 12-Jul-04 08:18 by madison Image text-base: 0x80010000, data-base: 0x8055C000

ROM: Bootstrap program is C2950 boot loader

UpperSwitch uptime is 54 minutes System returned to ROM by power-on System image file is "flash:/c2950-i6q4l2-mz.121-22.EA1.bin"

cisco WS-C2950T-24 (RC32300) processor (revision Q0) with 20873K bytes of memory. Processor board ID FOC0833X1GW Last reset from system-reset Running Enhanced Image

24 FastEthernet/IEEE 802.3 interface(s) 2 Gigabit Ethernet/IEEE 802.3 interface(s)

32K bytes of flash-simulated non-volatile configuration memory. Base ethernet MAC Address: 00:12:43:A0:FB:40 Motherboard assembly number: 73-6114-10 Power supply part number: 34-0965-01 Motherboard serial number: FOC08412CTA Power supply serial number: DAB0838GVD2 Model revision number: Q0 Motherboard revision number: A0 Model number: WS-C2950T-24 System serial number: FOC0833X1GW Configuration register is 0xF

UpperSwitch#show cdp nei det

------------------------- Device ID: ExternalSwitch Entry address(es): IP address: 172.16.253.4 Platform: cisco WS-C2950-24, Capabilities: Switch IGMP Interface: FastEthernet0/4, Port ID (outgoing port): FastEthernet0/1 Holdtime : 145 sec

Version : Cisco Internetwork Operating System Software IOS (tm) C2950 Software (C2950-I6Q4L2-M), Version 12.1(22)EA2, RELEASE SOFTWARE (fc1) Copyright (c) 1986-2004 by cisco Systems, Inc. Compiled Sun 07-Nov-04 23:14 by antonino

advertisement version: 2 Protocol Hello: OUI=0x00000C, Protocol ID=0x0112; payload len=27, value=00000000FFFFFFFF010221FF00000000000000137FB64B00FF0000 VTP Management Domain: '' Native VLAN: 1 Duplex: full Management address(es): IP address: 172.16.253.4

------------------------- Device ID: Kyota Entry address(es): IP address: 212.25.92.190 Platform: Cisco 1760, Capabilities: Router Switch Interface: FastEthernet0/1, Port ID (outgoing port): FastEthernet0/0.3 Holdtime : 134 sec

Version : Cisco IOS Software, C1700 Software (C1700-IPBASE-M), Version 12.3(11)T3, RELEASE SOFTWARE (fc4) Technical Support:

formatting link
(c) 1986-2005 by Cisco Systems, Inc. Compiled Wed 26-Jan-05 09:15 by pwade

advertisement version: 2 VTP Management Domain: '' Duplex: full Management address(es):

------------------------- Device ID: 00409657ba8d Entry address(es): IP address: 172.16.1.65 Platform: AIR-AP350, Capabilities: Interface: FastEthernet0/23, Port ID (outgoing port): fec0 Holdtime : 149 sec

Version : Cisco 350 Series AP 11.21

advertisement version: 2 Duplex: full Power drawn: 7.000 Watts Management address(es):

------------------------- Device ID: PhoneSwitch Entry address(es): IP address: 172.16.253.3 Platform: cisco WS-C2950-24, Capabilities: Switch IGMP Interface: FastEthernet0/2, Port ID (outgoing port): FastEthernet0/1 Holdtime : 150 sec

Version : Cisco Internetwork Operating System Software IOS (tm) C2950 Software (C2950-I6Q4L2-M), Version 12.1(22)EA2, RELEASE SOFTWARE (fc1) Copyright (c) 1986-2004 by cisco Systems, Inc. Compiled Sun 07-Nov-04 23:14 by antonino

advertisement version: 2 Protocol Hello: OUI=0x00000C, Protocol ID=0x0112; payload len=27, value=00000000FFFFFFFF010221FF00000000000000137FB5D000FF0000 VTP Management Domain: '' Native VLAN: 1 Duplex: full Management address(es): IP address: 172.16.253.3

------------------------- Device ID: LowerSwitch Entry address(es): IP address: 172.16.253.2 Platform: cisco WS-C2950T-24, Capabilities: Switch IGMP Interface: GigabitEthernet0/1, Port ID (outgoing port): GigabitEthernet0/1 Holdtime : 146 sec

Version : Cisco Internetwork Operating System Software IOS (tm) C2950 Software (C2950-I6Q4L2-M), Version 12.1(22)EA1, RELEASE SOFTWARE (fc1) Copyright (c) 1986-2004 by cisco Systems, Inc. Compiled Mon 12-Jul-04 08:18 by madison

advertisement version: 2 Protocol Hello: OUI=0x00000C, Protocol ID=0x0112; payload len=27, value=00000000FFFFFFFF010221FF000000000000001243A2B140FF0000 VTP Management Domain: '' Native VLAN: 1 Duplex: full Management address(es): IP address: 172.16.253.2

UpperSwitch#show int trunk

Port Mode Encapsulation Status Native vlan Fa0/1 on 802.1q trunking 1 Fa0/2 on 802.1q trunking 1 Fa0/3 on 802.1q trunking 1 Fa0/4 on 802.1q trunking 1 Gi0/1 on 802.1q trunking 1

Port Vlans allowed on trunk Fa0/1 1-4094 Fa0/2 1-4094 Fa0/3 1-4094 Fa0/4 1-4094 Gi0/1 1-4094

Port Vlans allowed and active in management domain Fa0/1 1-3,11,101,301,901 Fa0/2 1-3,11,101,301,901 Fa0/3 1-3,11,101,301,901 Fa0/4 1-3,11,101,301,901 Gi0/1 1-3,11,101,301,901

Port Vlans in spanning tree forwarding state and not pruned Fa0/1 1-3,11,101,301,901 Fa0/2 1-3,11,101,301,901 Fa0/3 1-3,11,101,301,901 Fa0/4 1-3,11,101,301,901 Gi0/1 1-3,11,101,301,901

Reply to
Aharon Schkolnik

Q1. If you do a long running ping from the router to the upper-switch mgmt address on vlan 1, do you have any ping packet loss?

Q2. what does show interface vlan 1 on lower_switch show ?

Reply to
Merv

10000 1500 packets with 0 packet loss.

LowerSwitch#show interfaces vlan1 Vlan1 is up, line protocol is up Hardware is CPU Interface, address is 0012.43a2.b140 (bia 0012.43a2.b140) Internet address is 172.16.253.2/16 MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec, reliability 255/255, txload 1/255, rxload 1/255 Encapsulation ARPA, loopback not set ARP type: ARPA, ARP Timeout 04:00:00 Last input 00:00:00, output never, output hang never Last clearing of "show interface" counters 15:56:35 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 3000 bits/sec, 5 packets/sec 5 minute output rate 42000 bits/sec, 10 packets/sec 280021 packets input, 18492800 bytes, 0 no buffer Received 39239 broadcasts (0 IP multicast) 0 runts, 0 giants, 0 throttles 0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored 572459 packets output, 47714652 bytes, 0 underruns 0 output errors, 0 interface resets 0 output buffer failures, 0 output buffers swapped out

(but at the same time, on UpperSwitch):

UpperSwitch#show interf vlan1 Vlan1 is up, line protocol is up Hardware is CPU Interface, address is 0012.43a0.fb40 (bia 0012.43a0.fb40) Internet address is 172.16.253.1/16 MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec, reliability 251/255, txload 1/255, rxload 1/255 Encapsulation ARPA, loopback not set ARP type: ARPA, ARP Timeout 04:00:00 Last input 00:00:00, output never, output hang never Last clearing of "show interface" counters 15:17:06 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 205000 bits/sec, 3 packets/sec 5 minute output rate 317000 bits/sec, 34 packets/sec 87589 packets input, 22114716 bytes, 0 no buffer Received 37565 broadcasts (0 IP multicast) 0 runts, 0 giants, 0 throttles 27510 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored 1593022 packets output, 122780864 bytes, 0 underruns 0 output errors, 0 interface resets 0 output buffer failures, 0 output buffers swapped out

Reply to
Aharon Schkolnik

I have run a series of ping tests from router to switch, from switch to router, from switch to switch, etc. I do not have any packet loss.

However, if I c> >

Reply to
Aharon Schkolnik

okay.

Q1. What ports are in VLAN 1 on upper_switch ?

Q2. What does the output of show interface error counters display ?

Reply to
Merv

UpperSwitch#show vlan

VLAN Name Status Ports

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

1 default active Fa0/3, Fa0/14, Fa0/15, Fa0/17, Fa0/18, Fa0/19, Fa0/20 Fa0/21, Fa0/23, Fa0/24 2 VLAN0002 active 3 VLAN0003 active Fa0/5, Fa0/6, Fa0/7, Fa0/8, Fa0/9, Fa0/10, Fa0/12, Fa0/13 Fa0/16, Fa0/22 11 VLAN0011 active Fa0/11 101 VLAN0101 active 301 VLAN0301 active 901 VLAN0901 active 1002 fddi-default act/unsup 1003 token-ring-default act/unsup 1004 fddinet-default act/unsup 1005 trnet-default act/unsup

The only interfaces with errors (at this moment) are gigaethernet 0/1 and vlan 1, as below:

The CRCs on the giga interface are my second problem. I am not sure it is a hardware problem since I have swapped cables, ports and even switches to no avail. It may be related to the errors on VLAN1 problem, but even if it is, I am not sure which problem is causing the other.

UpperSwitch#sh interfaces gigabitEthernet 0/1 GigabitEthernet0/1 is up, line protocol is up (connected) Hardware is Gigabit Ethernet, address is 0012.43a0.fb59 (bia 0012.43a0.fb59) MTU 1500 bytes, BW 1000000 Kbit, DLY 1000 usec, reliability 255/255, txload 1/255, rxload 1/255 Encapsulation ARPA, loopback not set Keepalive set (10 sec) Full-duplex, 1000Mb/s, media type is RJ45 input flow-control is off, output flow-control is off ARP type: ARPA, ARP Timeout 04:00:00 Last input 00:00:09, output 00:00:01, output hang never Last clearing of "show interface" counters 00:01:55 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 25000 bits/sec, 16 packets/sec 30 second output rate 1101000 bits/sec, 121 packets/sec 1670 packets input, 298098 bytes, 0 no buffer Received 82 broadcasts (0 multicast) 0 runts, 0 giants, 0 throttles 2 input errors, 2 CRC, 0 frame, 0 overrun, 0 ignored 0 watchdog, 12 multicast, 0 pause input 0 input packets with dribble condition detected 13685 packets output, 15651627 bytes, 0 underruns 0 output errors, 0 collisions, 0 interface resets 0 babbles, 0 late collision, 0 deferred 0 lost carrier, 0 no carrier, 0 PAUSE output 0 output buffer failures, 0 output buffers swapped out

UpperSwitch#show interfaces vlan1 Vlan1 is up, line protocol is up Hardware is CPU Interface, address is 0012.43a0.fb40 (bia 0012.43a0.fb40) Internet address is 172.16.253.1/16 MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec, reliability 251/255, txload 1/255, rxload 1/255 Encapsulation ARPA, loopback not set ARP type: ARPA, ARP Timeout 04:00:00 Last input 00:00:00, output never, output hang never Last clearing of "show interface" counters 00:03:14 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 1000 bits/sec, 4 packets/sec 5 minute output rate 88000 bits/sec, 31 packets/sec 1253 packets input, 80744 bytes, 0 no buffer Received 306 broadcasts (0 IP multicast) 0 runts, 0 giants, 0 throttles 97 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored 6208 packets output, 2330465 bytes, 0 underruns 0 output errors, 0 interface resets 0 output buffer failures, 0 output buffers swapped out

Reply to
Aharon Schkolnik

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