[afnog] VLANs on Cisco Catalyst 2950
Herbert Maosa
h_maosa at blueyonder.co.uk
Wed Jun 14 02:37:40 EAT 2006
Are you still having issues with the Vlans ? or is this just an update
about the configuration ? The config looks good to me and it should
work. This swith will default to dot1q trunking on Fa0/24 as you dont
have options for changing the encapsulation to something different. But
dot1q is what we want anyway.
regards,
Herbert.
Bruce Zamaere wrote:
> Guys,
>
> Sorry I took so long to respond. Anyway here's my configuration again
> with the the output of my "sh vlan".
>
> regards,
>
> Bruce.
>
>
> On 5/26/06, Gaurab Raj Upadhaya <gaurab at lahai.com> wrote:
>> -----BEGIN PGP SIGNED MESSAGE-----
>> Hash: SHA1
>>
>>
>> On May 26, 2006, at 11:04 AM, Mark Tinka wrote:
>>
>> > On Friday 26 May 2006 11:56, Patrick Okui wrote:
>> >
>> >> Well, I deleted the VLAN database before I added the VLANs and
>> >> "sh vlan" didn't show me anything I didn't expect.
>> >
>> > Hmmh... it doesn't really matter to the switch; as long as it has
>> > a corresponding entry for a VLAN, in its VLAN database, locally
>> > configured on one of its ports, it should work.
>>
>> We ran into similar problem at one of the previous SANOGs. if you
>> have a output of 'sh vlan' can you send it as well. I have a hunch
>> it's similar problem.
>>
>> But i am a bit surprise, because cisco phil and i and one another guy
>> spend a whole night trying to fix this, only to do the most unlikely
>> thing to fix it :-), so he should have remembered.
>>
>> In our case, we had to create ISL vlans for each of the dot 1q vlans
>> we wanted to associate with the ports. i.e, explicitly create VLAN
>> 101, 102 and so on.
>>
>> Philip says that this shouldn't have been the case with newer IOS,
>> but it may be something to do with the older hardware.
>>
>> 'sh Vlan' please..
>>
>> thanks
>>
>>
>> -- gaurab
>>
>>
>> /////////////////////////////////////////////////////+9779851038080
>> gaurab at lahai dot com
>>
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>> liyidqHzMJeqt13rSVipMJg=
>> =cLMe
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> ------------------------------------------------------------------------
>
> Switch#sh run
> Building configuration...
>
> Current configuration : 1071 bytes
> !
> version 12.1
> no service pad
> service timestamps debug uptime
> service timestamps log uptime
> no service password-encryption
> !
> hostname Switch
> !
> !
> ip subnet-zero
> !
> !
> spanning-tree mode pvst
> no spanning-tree optimize bpdu transmission
> spanning-tree extend system-id
> !
> !
> !
> !
> interface FastEthernet0/1
> !
> interface FastEthernet0/2
> !
> interface FastEthernet0/3
> !
> interface FastEthernet0/4
> !
> interface FastEthernet0/5
> !
> interface FastEthernet0/6
> !
> interface FastEthernet0/7
> !
> interface FastEthernet0/8
> !
> interface FastEthernet0/9
> !
> interface FastEthernet0/10
> !
> interface FastEthernet0/11
> !
> interface FastEthernet0/12
> !
> interface FastEthernet0/13
> !
> interface FastEthernet0/14
> !
> interface FastEthernet0/15
> !
> interface FastEthernet0/16
> !
> interface FastEthernet0/17
> !
> interface FastEthernet0/18
> !
> interface FastEthernet0/19
> !
> interface FastEthernet0/20
> !
> interface FastEthernet0/21
> !
> interface FastEthernet0/22
> !
> interface FastEthernet0/23
> !
> interface FastEthernet0/24
> !
> interface Vlan1
> no ip address
> no ip route-cache
> shutdown
> !
> ip http server
> !
> line con 0
> line vty 5 15
> !
> !
> end
>
> Switch#
> Switch#vlan database
> % Warning: It is recommended to configure VLAN from config mode,
> as VLAN database mode is being deprecated. Please consult user
> documentation for configuring VTP/VLAN in config mode.
>
> Switch(vlan)#vtp server
> Device mode already VTP SERVER.
> Switch(vlan)#vlan 101 name Surgery
> VLAN 101 added:
> Name: Surgery
> Switch(vlan)#vlan 102 name Medicine
> VLAN 102 added:
> Name: Medicine
> Switch(vlan)#vlan 103 name Paeds
> VLAN 103 added:
> Name: Paeds
> Switch(vlan)#exit
> APPLY completed.
> Exiting....
> Switch#sh vlan
>
> VLAN Name Status Ports
> ---- -------------------------------- --------- -------------------------------
> 1 default active Fa0/1, Fa0/2, Fa0/3, Fa0/4
> Fa0/5, Fa0/6, Fa0/7, Fa0/8
> Fa0/9, Fa0/10, Fa0/11, Fa0/12
> Fa0/13, Fa0/14, Fa0/15, Fa0/16
> Fa0/17, Fa0/18, Fa0/19, Fa0/20
> Fa0/21, Fa0/22, Fa0/23, Fa0/24
> 101 Surgery active
> 102 Medicine active
> 103 Paeds active
> 1002 fddi-default act/unsup
> 1003 token-ring-default act/unsup
> 1004 fddinet-default act/unsup
> 1005 trnet-default act/unsup
>
> VLAN Type SAID MTU Parent RingNo BridgeNo Stp BrdgMode Trans1 Trans2
> ---- ----- ---------- ----- ------ ------ -------- ---- -------- ------ ------
> 1 enet 100001 1500 - - - - - 0 0
> 101 enet 100101 1500 - - - - - 0 0
> 102 enet 100102 1500 - - - - - 0 0
> 103 enet 100103 1500 - - - - - 0 0
>
> VLAN Type SAID MTU Parent RingNo BridgeNo Stp BrdgMode Trans1 Trans2
> ---- ----- ---------- ----- ------ ------ -------- ---- -------- ------ ------
> 1002 fddi 101002 1500 - - - - - 0 0
> 1003 tr 101003 1500 - - - - - 0 0
> 1004 fdnet 101004 1500 - - - ieee - 0 0
> 1005 trnet 101005 1500 - - - ibm - 0 0
>
> Remote SPAN VLANs
> ------------------------------------------------------------------------------
>
>
> Primary Secondary Type Ports
> ------- --------- ----------------- ------------------------------------------
>
> Switch#conf t
> Enter configuration commands, one per line. End with CNTL/Z.
> Switch(config)#int fa 0/1
> Switch(config-if)#switchport access vlan 101
> Switch(config-if)#exit
> Switch(config)#int fa 0/2
> Switch(config-if)#switchpot rt mode access
> Switch(config-if)#switchport access vlan 102
> Switch(config-if)#exit
> Switch(config)#int fa 0/3
> Switch(config-if)#switchport mode access
> Switch(config-if)#switchport access vlan 103
> Switch(config-if)#exit
> Switch(config)#int fa 0/24
> Switch(config-if)#switchport mode trunk
> Switch(config-if)#switchport trunk ?
> allowed Set allowed VLAN characteristics when interface is in trunking mode
> native Set trunking native characteristics when interface is in trunking
> mode
> pruning Set pruning VLAN characteristics when interface is in trunking mode
>
> Switch(config-if)#switchport trunk allowed vlan 101-103
> Switch(config-if)#exit
> Switch(config)#exit
> Switch#
> 00:05:58: %SYS-5-CONFIG_I: Configured from console by console
> Switch#sh run
> Building configuration...
>
> Current configuration : 1476 bytes
> !
> version 12.1
> no service pad
> service timestamps debug uptime
> service timestamps log uptime
> no service password-encryption
> !
> hostname Switch
> !
> !
> ip subnet-zero
> !
> !
> spanning-tree mode pvst
> no spanning-tree optimize bpdu transmission
> spanning-tree extend system-id
> !
> !
> !
> !
> interface FastEthernet0/1
> switchport access vlan 101
> switchport mode access
> !
> interface FastEthernet0/2
> switchport access vlan 102
> switchport mode access
> !
> interface FastEthernet0/3
> switchport access vlan 103
> switchport mode access
> !
> interface FastEthernet0/4
> !
> interface FastEthernet0/5
> !
> interface FastEthernet0/6
> !
> interface FastEthernet0/7
> !
> interface FastEthernet0/8
> !
> interface FastEthernet0/9
> !
> interface FastEthernet0/10
> !
> interface FastEthernet0/11
> !
> interface FastEthernet0/12
> !
> interface FastEthernet0/13
> !
> interface FastEthernet0/14
> !
> interface FastEthernet0/15
> !
> interface FastEthernet0/16
> !
> interface FastEthernet0/17
> !
> interface FastEthernet0/18
> !
> interface FastEthernet0/19
> !
> interface FastEthernet0/20
> !
> interface FastEthernet0/21
> !
> interface FastEthernet0/22
> !
> interface FastEthernet0/23
> !
> interface FastEthernet0/24
> switchport trunk allowed vlan 101-103
> switchport mode trunk
> !
> interface Vlan1
> no ip address
> no ip route-cache
> !
> interface Vlan101
> no ip address
> no ip route-cache
> shutdown
> !
> interface Vlan102
> no ip address
> no ip route-cache
> shutdown
> !
> interface Vlan103
> no ip address
> no ip route-cache
> shutdown
> !
> ip http server
> !
> line con 0
> line vty 5 15
> !
> !
> end
>
> Switch#sh vlan
>
> VLAN Name Status Ports
> ---- -------------------------------- --------- -------------------------------
> 1 default active Fa0/4, Fa0/5, Fa0/6, Fa0/7
> Fa0/8, Fa0/9, Fa0/10, Fa0/11
> Fa0/12, Fa0/13, Fa0/14, Fa0/15
> Fa0/16, Fa0/17, Fa0/18, Fa0/19
> Fa0/20, Fa0/21, Fa0/22, Fa0/23
> Fa0/24
> 101 Surgery active Fa0/1
> 102 Medicine active Fa0/2
> 103 Paeds active Fa0/3
> 1002 fddi-default act/unsup
> 1003 token-ring-default act/unsup
> 1004 fddinet-default act/unsup
> 1005 trnet-default act/unsup
>
> VLAN Type SAID MTU Parent RingNo BridgeNo Stp BrdgMode Trans1 Trans2
> ---- ----- ---------- ----- ------ ------ -------- ---- -------- ------ ------
> 1 enet 100001 1500 - - - - - 0 0
> 101 enet 100101 1500 - - - - - 0 0
> 102 enet 100102 1500 - - - - - 0 0
> 103 enet 100103 1500 - - - - - 0 0
>
> VLAN Type SAID MTU Parent RingNo BridgeNo Stp BrdgMode Trans1 Trans2
> ---- ----- ---------- ----- ------ ------ -------- ---- -------- ------ ------
> 1002 fddi 101002 1500 - - - - - 0 0
> 1003 tr 101003 1500 - - - - - 0 0
> 1004 fdnet 101004 1500 - - - ieee - 0 0
> 1005 trnet 101005 1500 - - - ibm - 0 0
>
> Remote SPAN VLANs
> ------------------------------------------------------------------------------
>
>
> Primary Secondary Type Ports
> ------- --------- ----------------- ------------------------------------------
>
> Switch#
> ------------------------------------------------------------------------
>
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