Hi Yonkerbonk,
As you requested, I did a show interface on the ports that are used on both
switches.
Regards,
----- on THE 1912------
sh int f 0/26
FastEthernet 0/26 is Enabled
Hardware is Built-in 100Base-TX
Address is 0050.50E2.42DA
MTU 1500 bytes, BW 100000 Kbits
Port monitoring: Disabled
Unknown unicast flooding: Enabled
Unregistered multicast flooding: Enabled
Description:
Duplex/Flow Control setting: Auto-negotiate
Auto-negotiation status: Full duplex
Enhanced Congestion Control: Disabled
--More--
Receive Statistics Transmit Statistics
------------------------------------- -------------------------------------
Total good frames 45739 Total frames 8243
Total octets 4758190 Total octets 935475
Broadcast/multicast frames 45687 Broadcast/multicast frames 8206
Broadcast/multicast octets 4752684 Broadcast/multicast octets 930237
Good frames forwarded 27228 Deferrals 0
Frames filtered 18511 Single collisions 0
Runt frames 0 Multiple collisions 0
No buffer discards 0 Excessive collisions 0
Queue full discards 0
Errors: Errors:
FCS errors 0 Late collisions 0
Alignment errors 0 Excessive deferrals 0
Giant frames 0 Jabber errors 0
Address violations 0 Other transmit errors 0
C1912#sh int f 0/27
FastEthernet 0/27 is Enabled
Hardware is Built-in 100Base-TX
Address is 0050.50E2.42DB
MTU 1500 bytes, BW 100000 Kbits
Port monitoring: Disabled
Unknown unicast flooding: Enabled
Unregistered multicast flooding: Enabled
Description:
Duplex/Flow Control setting: Auto-negotiate
Auto-negotiation status: Full duplex
Enhanced Congestion Control: Disabled
--More--
Receive Statistics Transmit Statistics
------------------------------------- -------------------------------------
Total good frames 4788 Total frames 28073
Total octets 366300 Total octets 2553093
Broadcast/multicast frames 4788 Broadcast/multicast frames 28064
Broadcast/multicast octets 366300 Broadcast/multicast octets 2552388
Good frames forwarded 4788 Deferrals 0
Frames filtered 0 Single collisions 0
Runt frames 0 Multiple collisions 0
No buffer discards 0 Excessive collisions 0
Queue full discards 0
Errors: Errors:
FCS errors 0 Late collisions 0
Alignment errors 0 Excessive deferrals 0
Giant frames 0 Jabber errors 0
Address violations 0 Other transmit errors 0
C1912#
---- ON THE 2924XL
sh int f 0/1
FastEthernet0/1 is up, line protocol is up
Hardware is Fast Ethernet, address is 0050.3ef0.3581 (bia 0050.3ef0.3581)
MTU 1500 bytes, BW 10000 Kbit, DLY 1000 usec, rely 255/255, load 1/255
Encapsulation ARPA, loopback not set, keepalive not set
Duplex setting unknown, Unknown Speed, 100BaseTX/FX
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:31, output 00:00:01, output hang never
Last clearing of "show interface" counters never
Queueing strategy: fifo
Output queue 0/40, 0 drops; input queue 0/75, 0 drops
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 1 packets/sec
30444 packets input, 5042703 bytes, 0 no buffer
Received 20759 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
0 watchdog, 8294 multicast
0 input packets with dribble condition detected
100788 packets output, 3850388 bytes, 0 underruns
0 output errors, 0 collisions, 1 interface resets
0 babbles, 0 late collision, 1 deferred
0 lost carrier, 0 no carrier
0 output buffer failures, 0 output buffers swapped out
C2924XL#sh int f 0/9
FastEthernet0/9 is up, line protocol is up
Hardware is Fast Ethernet, address is 0050.3ef0.358a (bia 0050.3ef0.358a)
MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec, rely 255/255, load 1/255
Encapsulation ARPA, loopback not set, keepalive not set
Duplex setting unknown, Unknown Speed, 100BaseTX/FX
ARP type: ARPA, ARP Timeout 04:00:00
Last input never, output 00:00:01, output hang never
Last clearing of "show interface" counters never
Queueing strategy: fifo
Output queue 0/40, 0 drops; input queue 0/75, 0 drops
5 minute input rate 88000 bits/sec, 18 packets/sec
5 minute output rate 33000 bits/sec, 17 packets/sec
699710 packets input, 277674807 bytes, 0 no buffer
Received 5474 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
0 watchdog, 0 multicast
0 input packets with dribble condition detected
737413 packets output, 152885854 bytes, 0 underruns
0 output errors, 0 collisions, 1 interface resets
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier
0 output buffer failures, 0 output buffers swapped out
C2924XL#sh int f 0/16
FastEthernet0/16 is up, line protocol is up
Hardware is Fast Ethernet, address is 0050.3ef0.3591 (bia 0050.3ef0.3591)
MTU 1500 bytes, BW 10000 Kbit, DLY 1000 usec, rely 255/255, load 1/255
Encapsulation ARPA, loopback not set, keepalive not set
Half-duplex, 10Mb/s, 100BaseTX/FX
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:36, output 00:00:01, output hang never
Last clearing of "show interface" counters never
Queueing strategy: fifo
Output queue 0/40, 0 drops; input queue 0/75, 0 drops
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 1 packets/sec
12529 packets input, 1218710 bytes, 0 no buffer
Received 2053 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
0 watchdog, 1760 multicast
0 input packets with dribble condition detected
107043 packets output, 5164163 bytes, 0 underruns
0 output errors, 0 collisions, 1 interface resets
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier
0 output buffer failures, 0 output buffers swapped out
C2924XL#sh int f 0/20
FastEthernet0/20 is up, line protocol is up
Hardware is Fast Ethernet, address is 0050.3ef0.3596 (bia 0050.3ef0.3596)
MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec, rely 255/255, load 1/255
Encapsulation ARPA, loopback not set, keepalive not set
Full-duplex, 100Mb/s, 100BaseTX/FX
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:01, output 00:00:00, output hang never
Last clearing of "show interface" counters never
Queueing strategy: fifo
Output queue 0/40, 0 drops; input queue 0/75, 0 drops
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 1000 bits/sec, 3 packets/sec
21455 packets input, 3875096 bytes, 0 no buffer
Received 20606 broadcasts, 0 runts, 0 giants, 0 throttles
5595 input errors, 5595 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
0 watchdog, 20442 multicast
0 input packets with dribble condition detected
349980 packets output, 16242994 bytes, 0 underruns
0 output errors, 0 collisions, 1 interface resets
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier
0 output buffer failures, 0 output buffers swapped out
C2924XL#sh int f 0/21
FastEthernet0/21 is up, line protocol is up
Hardware is Fast Ethernet, address is 0050.3ef0.3597 (bia 0050.3ef0.3597)
MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec, rely 255/255, load 1/255
Encapsulation ARPA, loopback not set, keepalive not set
Full-duplex, 100Mb/s, 100BaseTX/FX
ARP type: ARPA, ARP Timeout 04:00:00
Last input 03:49:16, output 00:00:01, output hang never
Last clearing of "show interface" counters never
Queueing strategy: fifo
Output queue 0/40, 0 drops; input queue 0/75, 0 drops
5 minute input rate 1000 bits/sec, 2 packets/sec
5 minute output rate 0 bits/sec, 1 packets/sec
167770 packets input, 19224632 bytes, 0 no buffer
Received 167769 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
0 watchdog, 167594 multicast
0 input packets with dribble condition detected
100826 packets output, 3854354 bytes, 0 underruns
0 output errors, 0 collisions, 1 interface resets
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier
0 output buffer failures, 0 output buffers swapped out
C2924XL#sh int f 0/24
FastEthernet0/24 is up, line protocol is up
Hardware is Fast Ethernet, address is 0050.3ef0.359a (bia 0050.3ef0.359a)
MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec, rely 255/255, load 1/255
Encapsulation ARPA, loopback not set, keepalive not set
Half-duplex, 100Mb/s, 100BaseTX/FX
ARP type: ARPA, ARP Timeout 04:00:00
Last input never, output 00:00:00, output hang never
Last clearing of "show interface" counters never
Queueing strategy: fifo
Output queue 0/40, 0 drops; input queue 0/75, 0 drops
5 minute input rate 27000 bits/sec, 11 packets/sec
5 minute output rate 76000 bits/sec, 13 packets/sec
686489 packets input, 149034582 bytes, 0 no buffer
Received 2589 broadcasts, 0 runts, 0 giants, 0 throttles
912 input errors, 22 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
0 watchdog, 0 multicast
0 input packets with dribble condition detected
750225 packets output, 281599835 bytes, 0 underruns
0 output errors, 3284 collisions, 1 interface resets
0 babbles, 0 late collision, 3842 deferred
0 lost carrier, 0 no carrier
0 output buffer failures, 0 output buffers swapped out
C2924XL#
Pierre-Alex
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of
Yonkerbonk
Sent: Tuesday, February 13, 2001 6:26 PM
To: Pierre-Alex; [EMAIL PROTECTED]
Cc: Dale Cunningham
Subject: Re: DISTURBING: Spanning Tree Protocol Does not Work.
Could you send a config for both switches? How about a
fuller show spantree? A show port on the two ports?
Maybe this is caused by some half-duplex, full-duplex
issue... though I can't rationalize that explanation.
The fact that one port shows the switch as being the
root bridge and the other port pointing outwards is
getting me.
Also, who is MAC 0050.50E2.42C0?
Michael
--- Pierre-Alex <[EMAIL PROTECTED]> wrote:
> Or I am really dumb....
>
> I have two switches a Cisco 2924XL-EN and a Cisco
> 1912-EN. I have setup port
> A and port B of the 1912 swictch to do ISL trunking
> with the 2924XL
>
> This situation should have created a loop and the
> Spanning Tree protocol
> should have disabled port B.( I have setup the
> 2924XL to be the root).
> Instead I am getting the
>
> following output, with both port A and B in the
> fowarding mode (see below)
> So either the Spanning Tree protocol did not do its
> job (with due respect to
> its creator),
>
> or the trunking ports are not part of the spanning
> tree calculation, or I am
> really dumb and I missed something in the story ....
>
> Any comment?
>
>
>
> DISL state: On, Trunking: On, Encapsulation type:
> ISL
> C1912#sh trunk b
> DISL state: On, Trunking: On, Encapsulation type:
> ISL
>
> Port FastEthernet 0/26 of VLAN1 is Forwarding
> Port path cost 10, Port priority 128
> Designated root has priority 32768, address
> 0050.3EF0.3580
> Designated bridge has priority 32768, address
> 0050.3EF0.3580
> Designated port is 22, path cost 0
> Timers: message age 20, forward delay 15, hold 1
> --More--
> Port FastEthernet 0/27 of VLAN1 is Forwarding
> Port path cost 10, Port priority 128
> Designated root has priority 32768, address
> 0050.3EF0.3580
> Designated bridge has priority 32768, address
> 0050.50E2.42C0
> Designated port is 27, path cost 10
> Timers: message age 20, forward delay 15, hold 1
>
>
> Pierre-Alex
>
>
> _________________________________
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