From: gladston@br.ibm.com
Date: Thu May 26 2005 - 09:34:27 GMT-3
Why sometimes IOS is so crazy is a mistery for me. :)
I started today's lab testing Barrerj idea of shutting down vlan 1.
I shutdown int vlan 1 and it worked with native vlan 4.
Then, I typed no shutdown, changed to default native vlan 1. All works
fine. Then I changed again to native vlan 4 and it is working just fine.
Rack2CAT1(config-if)#int vlan 1
Rack2CAT1(config-if)#no sh
Rack2CAT1(config-if)#int fa 0/4
Rack2CAT1(config-if)# sw tr native vlan 4
Rack2R4(config-subif)#int e 0/0.4
Rack2R4(config-subif)#encapsulation dot1Q 4 na
Rack2R4(config-subif)#do pin 142.20.44.7
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 142.20.44.7, timeout is 2 seconds:
!!!!!
Rack2CAT1(config-if)#do sh int fa 0/4 sw
Name: Fa0/4
Switchport: Enabled
Administrative Mode: trunk
Operational Mode: trunk
Administrative Trunking Encapsulation: dot1q
Operational Trunking Encapsulation: dot1q
Negotiation of Trunking: Off
Access Mode VLAN: 4 (VLAN0004)
Trunking Native Mode VLAN: 4 (VLAN0004)
Rack2R4(config-subif)#do sh vlan
Virtual LAN ID: 1 (IEEE 802.1Q Encapsulation)
vLAN Trunk Interface: Ethernet0/0
Protocols Configured: Address: Received: Transmitted:
Virtual LAN ID: 4 (IEEE 802.1Q Encapsulation)
vLAN Trunk Interface: Ethernet0/0.4
This is configured as native Vlan for the following interface(s) :
Ethernet0/0
Protocols Configured: Address: Received: Transmitted:
IP 142.20.44.4 251 318
Thanks for the replies,
Cordially,
------------------------------------------------------------------
Gladston
"barrerj1" <barrerj1@hotmail.com>
25/05/2005 20:03
To
"'Ed Lui'" <edwlui@gmail.com>, Alaerte Gladston Vidali/Brazil/IBM@IBMBR
cc
"'Troy Levin'" <troylevin@hotmail.com>
Subject
RE: Help with Native Vlan
I had a similar problem.
Shutdown VLAN 1 on your on your switch and it should come up.
interface FastEthernet0/4
> > switchport trunk encapsulation dot1q
switchport trunk native vlan 4
> > switchport mode trunk
switchport nonegotiate
mls qos trust
ip-precedence spanning-tree portfast end
!
Int vlan 1
Shut
HTH
JB
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of Ed
Lui
Sent: Wednesday, May 25, 2005 5:24 PM
To: gladston@br.ibm.com
Cc: Troy Levin; ccielab@groupstudy.com
Subject: Re: Help with Native Vlan
Gladston,
Not sure if the host name corresponds to the router ? Looks like you were
working on router 4(Rack2R4) vs router 1(as shown on your
diagram)
R1----trunk----CAT1---vlan4--R7
HTH,
Ed Lui
On 5/25/05, gladston@br.ibm.com <gladston@br.ibm.com> wrote:
> Yes, R7 is configured to be on Vlan4 on CAT1, port fa0/7.
>
> Everything works fine until I try to test native vlan.
>
> Native vlan is the same on both sides, R4 e0/0.4 and CAT1 fa0/4.
>
> Cordially
> ------------------------------------------------------------------
> Gladston
>
>
>
> "Troy Levin" <troylevin@hotmail.com>
> 25/05/2005 17:34
>
> To
> Alaerte Gladston Vidali/Brazil/IBM@IBMBR, <ccielab@groupstudy.com> cc
>
> Subject
> Re: Help with Native Vlan
>
>
>
>
>
>
> Gladston.
>
> Is your CAT1 port connected to R7 configured for vlan4? If so then
> your traffic from R1 fa0/0.4 will be received by CAT1 as untagged and
> will be processed according to tables of SPT instance 4 which includes
> the port to R7.
>
> HTH,
>
> Troy
> ----- Original Message -----
> From: <gladston@br.ibm.com>
> To: <ccielab@groupstudy.com>
> Sent: Wednesday, May 25, 2005 1:25 PM
> Subject: Help with Native Vlan
>
>
> > If configuring native vlan other than 1, connectivity is lost.
> >
> > Any idea?
> > version is 12.2(15)T5 for router 2600 and 12.1(20)EA1a for 3550
> >
> > As it is an unexpected behavior I tested on another router and 3550.
> (but
> > the IOS is the same).
> >
> > R1----trunk----CAT1---vlan4--R7
> >
> > Rack2R4#sh run int e 0/0.4
> > Building configuration...
> >
> > Current configuration : 650 bytes
> > !
> > interface Ethernet0/0.4
> > encapsulation dot1Q 4 native
> > ip address 142.20.44.4 255.255.255.0 ip access-group 150 in ip
> > directed-broadcast ip multicast helper-map broadcast 229.1.1.1 110
> > rate-limit input access-group 121 512000 64000 96000 conform-action
> > continue exceed-action drop rate-limit input access-group 122 64000
> > 8000 12000 conform-action
> transmit
> > exceed-action dr
> > op
> > rate-limit input access-group 123 32000 4000 6000 conform-action
> transmit
> > exceed-action dro
> > p
> > no ip mroute-cache
> > ip policy route-map Local-traffic
> > ntp multicast 229.2.2.2
> > ipv6 address 2001:1:1:4::4/64
> > ipv6 address FEC0:2E3D:5B7C:4::4/64
> > ipv6 nd suppress-ra
> > end
> >
> > Rack2R4#
> > Rack2R4#sh vlan
> >
> > Virtual LAN ID: 1 (IEEE 802.1Q Encapsulation)
> >
> > vLAN Trunk Interface: Ethernet0/0
> >
> > Protocols Configured: Address: Received:
> > Transmitted:
> >
> > Virtual LAN ID: 4 (IEEE 802.1Q Encapsulation)
> >
> > vLAN Trunk Interface: Ethernet0/0.4
> >
> > This is configured as native Vlan for the following interface(s) :
> > Ethernet0/0
> >
> > Protocols Configured: Address: Received:
> > Transmitted:
> > IP 142.20.44.4 37
> > 90
> >
> > Rack2R4#
> >
> >
> > Rack2CAT1#sh run int fa 0/4
> > Building configuration...
> >
> > Current configuration : 203 bytes
> > !
> > interface FastEthernet0/4
> > switchport trunk encapsulation dot1q switchport trunk native vlan 4
> > switchport mode trunk switchport nonegotiate mls qos trust
> > ip-precedence spanning-tree portfast end
> >
> > Rack2CAT1#sh int fa 0/4 sw
> > Name: Fa0/4
> > Switchport: Enabled
> > Administrative Mode: trunk
> > Operational Mode: trunk
> > Administrative Trunking Encapsulation: dot1q Operational Trunking
> > Encapsulation: dot1q Negotiation of Trunking: Off Access Mode VLAN:
> > 1 (default) Trunking Native Mode VLAN: 4 (VLAN0004) Voice VLAN: none
> > Administrative private-vlan host-association: none Administrative
> > private-vlan mapping: none Administrative private-vlan trunk native
> > VLAN: none Administrative private-vlan trunk encapsulation: dot1q
> > Administrative private-vlan trunk normal VLANs: none Administrative
> > private-vlan trunk private VLANs: none Operational private-vlan:
> > none Trunking VLANs Enabled: ALL Pruning VLANs Enabled: 2-1001
> > Capture Mode Disabled Capture VLANs Allowed: ALL
> > Protected: false
> > Unknown unicast blocked: disabled
> > Unknown multicast blocked: disabled
> > Appliance trust: none
> >
> > Rack2R4(config-subif)#do pi 142.20.44.7
> >
> > Type escape sequence to abort.
> > Sending 5, 100-byte ICMP Echos to 142.20.44.7, timeout is 2 seconds:
> > ..
> >
> >
> > If native vlan is default, works fine:
> >
> > Rack2R4(config-subif)# encapsulation dot1Q 4
> >
> > Rack2CAT1(config-if)#sw tr na v 1
> >
> > Rack2R4(config-subif)#do pi 142.20.44.7
> >
> > Type escape sequence to abort.
> > Sending 5, 100-byte ICMP Echos to 142.20.44.7, timeout is 2 seconds:
> > !!!!!
> >
> > This is the network:
> >
> > R1----trunk----CAT1---vlan4--R7
> >
> > ____________________________________________________________________
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>
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