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Re: Help for trunking with dynamips and IEv4 posted 03/05/2007
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Ernesto,

You can try to type the command on all trunk see if any improvement. On my dynamips. In case if i don't type below command. The trunk will being struck.

sw trunk encapsulation dot1q

Rgds
Chris.
----- Original Message ----- From: <ernesto.mazuelos@xxxxxxxxx>
To: <ccielab@xxxxxxxxxxxxxx>
Sent: Monday, March 05, 2007 3:40 AM
Subject: Help for trunking with dynamips and IEv4



Hi,
I don't succeed in doing a simple trunk among two SW with dynamips

the trunk works well, but if ping from R1 to R2 no it works

R1-----SW1-----SW2--------R2

Rack1R1#ping 10.0.0.2 repeat 10

Type escape sequence to abort.
Sending 10, 100-byte ICMP Echos to 10.0.0.2, timeout is 2 seconds:
..........

Thanks


Config :





Do I forget me of something? R1 ! interface FastEthernet0/0 ip address 10.0.0.1 255.0.0.0 speed 100 full-duplex !

SW1
-----------
interface FastEthernet1/1
description To R1 F0/0
switchport access vlan 3
duplex full
speed 100
!
interface FastEthernet2/3
description To SW2 F2/3
switchport mode trunk
!

SW2
-----------
!
interface FastEthernet1/2
description To R2 F0/0
switchport access vlan 3
duplex full
speed 100
interface FastEthernet2/3
description To SW1 F2/3
switchport mode trunk
duplex full
speed 100
!

Rack1SW1#sh int tru

Port      Mode         Encapsulation  Status        Native vlan
Fa2/3     on           802.1q         trunking      1

Port      Vlans allowed on trunk
Fa2/3     1-1005

Port      Vlans allowed and active in management domain
Fa2/3     1-4

Port Vlans in spanning tree forwarding state and not pruned


Rack1SW2#sh int tru


Port      Mode         Encapsulation  Status        Native vlan
Fa2/3     on           802.1q         trunking      1
Fa2/4     off          802.1q         not-trunking  1
Fa2/5     off          802.1q         not-trunking  1

Port      Vlans allowed on trunk
Fa2/3     1-1005
Fa2/4     none
Fa2/5     none

Port      Vlans allowed and active in management domain
Fa2/3     1-4
Fa2/4     none
Fa2/5     none

Port      Vlans in spanning tree forwarding state and not pruned
Fa2/3     1-4
Fa2/4     none
Fa2/5     none



SW1
sw spa bri
---------
VLAN3
Spanning tree enabled protocol ieee
Root ID    Priority    32768
           Address     cc06.0170.0002
           This bridge is the root
           Hello Time   2 sec  Max Age 20 sec  Forward Delay 15 sec

Bridge ID  Priority    32768
           Address     cc06.0170.0002
           Hello Time   2 sec  Max Age 20 sec  Forward Delay 15 sec
           Aging Time 300

Interface Designated
Name Port ID Prio Cost Sts Cost Bridge ID Port ID
-------------------- ------- ---- ----- --- ----- -------------------- -------
FastEthernet1/1 128.42 128 19 FWD 0 32768 cc06.0170.0002 128.42
FastEthernet2/3 128.84 128 19 FWD 0 32768 cc06.0170.0002 128.84


SW2
sh spa bri
VLAN3
Spanning tree enabled protocol ieee
Root ID    Priority    32768
           Address     cc06.0170.0002
           Cost        19
           Port        84 (FastEthernet2/3)
           Hello Time   2 sec  Max Age 20 sec  Forward Delay 15 sec

Bridge ID  Priority    32768
           Address     cc07.066c.0002
           Hello Time   2 sec  Max Age 20 sec  Forward Delay 15 sec
           Aging Time 300

Interface Designated
Name Port ID Prio Cost Sts Cost Bridge ID Port ID
-------------------- ------- ---- ----- --- ----- -------------------- -------
FastEthernet1/2 128.43 128 19 FWD 19 32768 cc07.066c.0002 128.43
FastEthernet2/3 128.84 128 19 FWD 0 32768 cc06.0170.0002 128.84


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