[c-nsp] Catalyst 2950G Trunking Issue

[Michael K. Smith - Adhost]

Hello:

 

Okay, top posting.  J Is the default gateway reachable by both devices?  I didn't see an ARP entry that looked like a default gateway, given that only the remote-switch MAC Address.  If you have the same address for both that's either one of the switches or is not reachable then that may cause issues.

 

Mike

 

From: Juan C. Crespo R. [mailto:jcposeidon at cantv.net] 
Sent: Thursday, March 29, 2007 10:18 AM
To: Michael K. Smith - Adhost
Cc: cisco-nsp at puck.nether.net
Subject: Re: [c-nsp] Catalyst 2950G Trunking Issue

 

Ok

The 2950G Switch is L2, and I have the same default-gateway on both.

Thanks

Michael K. Smith - Adhost escribió: 

Hello Juan:
 
  

	-----Original Message-----
	From: cisco-nsp-bounces at puck.nether.net [mailto:cisco-nsp-
	bounces at puck.nether.net] On Behalf Of Juan C. Crespo R.
	Sent: Thursday, March 29, 2007 6:51 AM
	To: cisco-nsp at puck.nether.net
	Subject: Re: [c-nsp] Catalyst 2950G Trunking Issue
	 
	Reposting....
	 
	SWITCH-A#show interfaces gigabitEthernet 0/1 trunk
	 
	Port        Mode         Encapsulation  Status        Native vlan
	Gi0/1       on           802.1q         trunking      1
	 
	Port      Vlans allowed on trunk
	Gi0/1       1,10-25,354,456,845
	 
	Port        Vlans allowed and active in management domain
	Gi0/1       1
	 
	Port        Vlans in spanning tree forwarding state and not pruned
	Gi0/1       1
	 
	 
	SWITCH-A#show interfaces vlan 1
	Vlan1 is up, line protocol is up
	  Hardware is CPU Interface, address is 03b0.24b1.5180 (bia
	03b0.24b1.5180)
	  Internet address is 10.0.0.1/24
	  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 never, output never, 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 0 bits/sec, 0 packets/sec
	  5 minute output rate 0 bits/sec, 0 packets/sec
	     25 packets input, 3264 bytes, 0 no buffer
	     Received 0 broadcasts (0 IP multicast)
	     0 runts, 0 giants, 0 throttles
	     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
	     164 packets output, 0 bytes, 0 underruns
	     0 output errors, 4 interface resets
	     0 output buffer failures, 0 output buffers swapped out
	 
	SWITCH-A# show arp
	Protocol  Address          Age (min)  Hardware Addr   Type   Interface
	Internet  10.0.0.1                -   03b0.24b1.5180  ARPA   Vlan1
	 
	 
	SWITCH-B#show interfaces gigabitEthernet 0/1 trunk
	 
	Port        Mode         Encapsulation  Status        Native vlan
	Gi0/1       on           802.1q         trunking      1
	 
	Port      Vlans allowed on trunk
	Gi0/1       1,10-25,354,456,845
	 
	Port        Vlans allowed and active in management domain
	Gi0/1       1
	 
	Port        Vlans in spanning tree forwarding state and not pruned
	Gi0/1       1
	 
	 
	SWITCH-B#show interfaces vlan 1
	Vlan1 is up, line protocol is up
	  Hardware is CPU Interface, address is 03b2.24b1.5180 (bia
	03b2.24b1.5180)
	  Internet address is 10.0.0.2/24
	  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 never, output never, 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 0 bits/sec, 0 packets/sec
	  5 minute output rate 0 bits/sec, 0 packets/sec
	     210 packets input, 15072 bytes, 0 no buffer
	     Received 0 broadcasts (0 IP multicast)
	     0 runts, 0 giants, 0 throttles
	     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
	     34 packets output, 0 bytes, 0 underruns
	     0 output errors, 4 interface resets
	     0 output buffer failures, 0 output buffers swapped out
	 
	SWITCH-B# show arp
	Protocol  Address          Age (min)  Hardware Addr   Type   Interface
	Internet  10.0.0.2                -   03b2.24b1.5180  ARPA   Vlan1
	 
	 
	 
	SWITCH-B#ping 10.0.0.1
	 
	Type escape sequence to abort.
	Sending 5, 100-byte ICMP Echos to 10.0.0.1, timeout is 2 seconds:
	.....
	Success rate is 0 percent (0/5)
	 
	 
	 
	SWITCH-A#ping 10.0.0.2
	 
	Type escape sequence to abort.
	Sending 5, 100-byte ICMP Echos to 10.0.0.2, timeout is 2 seconds:
	.....
	Success rate is 0 percent (0/5)
	SWITCH-A#
	 
	    

 
 
Depending on whether or not your switch is running in L2 or L3 mode, do
you have either a default route, default-gateway or both?  For testing,
you may want to set the appropriate variable to the other device.
 
Mike