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Trunk VLANs from Catalyst 3750x to Nexus 5548UP

Gelliston
Level 1
Level 1

‎03-25-2016 09:09 PM - edited ‎03-08-2019 05:07 AM

I currently have a Core stack of 2 Catalyst 3750X.  I purchased 2 Nexus 5548UP to hang off the Ten Gigabit modules of the 3750 stack.  I am having trouble getting the VLANs on the 3750 to trunk over to the 5Ks.  I have configured the up links on the Nexus switches as I have on the rest of my Catalyst switches and I can not get the 5K to show the VLANs.  Any help on how to do this would be appreciated.  Most of the information I have found is trunking vlans to a 3750 from a 5k.  I need 3750 to a 5K.  Thanks!

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0 Helpful
5 Replies 5

Madhukrishnan Gopinathan Nair
Level 7
Level 7

‎03-26-2016 02:00 AM

Hi,

Could you please share the configuration of the interfaces from both sides.

Also have you created the vlan's on N5K? If already created and still not working, try manually allowing the vlan over trunk. 

switchport trunk allowed vlan <vlans you like to allow>

Thanks

Madhu.

0 Helpful

Gelliston
Level 1
Level 1
In response to Madhukrishnan Gopinathan Nair

‎03-26-2016 05:22 PM

I did not create the VLANs on the 5Ks.  I need those VLANs to come from the 3750 Stack

*****3750 X Core stack ******

interface Port-channel20
switchport trunk encapsulation dot1q
switchport mode trunk

interface TenGigabitEthernet1/1/1
switchport trunk encapsulation dot1q
switchport mode trunk
channel-group 20 mode active
!
interface TenGigabitEthernet1/1/2
switchport trunk encapsulation dot1q
switchport mode trunk
channel-group 20 mode active
!

interface TenGigabitEthernet2/1/1
switchport trunk encapsulation dot1q
switchport mode trunk
channel-group 20 mode active
!
interface TenGigabitEthernet2/1/2
switchport trunk encapsulation dot1q
switchport mode trunk
channel-group 20 mode active
!

interface Vlan1
no ip address
shutdown
!
interface Vlan3
ip address 192.168.1.1 255.255.255.0
ip helper-address 192.168.1.27
!
interface Vlan4
ip address 192.168.20.1 255.255.255.0
ip helper-address 192.168.1.27
!
interface Vlan5
ip address 192.168.25.1 255.255.255.0
ip helper-address 192.168.1.27
!
interface Vlan6
ip address 192.168.35.1 255.255.255.0
!
interface Vlan7
ip address 192.168.40.1 255.255.255.0
!
interface Vlan10
ip address 192.168.30.1 255.255.255.0
!
interface Vlan104
ip address 192.168.21.1 255.255.255.0
ip helper-address 192.168.1.27
!

********Nexus 5K TOR-1***********

Nexus-5548UP-TOR-1(config-if)# sh cdp nei
Capability Codes: R - Router, T - Trans-Bridge, B - Source-Route-Bridge
S - Switch, H - Host, I - IGMP, r - Repeater,
V - VoIP-Phone, D - Remotely-Managed-Device,
s - Supports-STP-Dispute


Device-ID Local Intrfce Hldtme Capability Platform Port ID
Core_Stack mgmt0 150 R S I WS-C3750X-48 Gig1/0/25
Nexus-5548UP-TOR-2(SSI1920006P) Eth1/31 154 S I s N5K-C5548UP Eth1/31
Nexus-5548UP-TOR-2(SSI1920006P) Eth1/32 154 S I s N5K-C5548UP Eth1/32
Core_Stack Eth2/15 145 R S I WS-C3750X-48 Ten2/1/1
Core_Stack Eth2/16 151 R S I WS-C3750X-48 Ten1/1/1

Nexus-5548UP-TOR-1(config-if)# sh vpc
Legend:
(*) - local vPC is down, forwarding via vPC peer-link

vPC domain id : 1
Peer status : peer adjacency formed ok
vPC keep-alive status : peer is alive
Configuration consistency status : success
Per-vlan consistency status : success
Type-2 consistency status : success
vPC role : primary
Number of vPCs configured : 2
Peer Gateway : Disabled
Dual-active excluded VLANs : -
Graceful Consistency Check : Enabled
Auto-recovery status : Enabled (timeout = 240 seconds)

vPC Peer-link status
---------------------------------------------------------------------
id Port Status Active vlans
-- ---- ------ --------------------------------------------------
1 Po1 up 1

vPC status
----------------------------------------------------------------------------
id Port Status Consistency Reason Active vlans
------ ----------- ------ ----------- -------------------------- -----------
15 Po15 up success success 1
16 Po16 up success success 1

interface port-channel15
switchport mode trunk
speed 10000
vpc 15

interface port-channel16
switchport mode trunk
speed 10000
vpc 16

interface Ethernet2/15
switchport mode trunk
channel-group 15

interface Ethernet2/16
switchport mode trunk
channel-group 16

******Nexus 5K TOR-2****

Nexus-5548UP-TOR-2(config-if)# sh vpc
Legend:
(*) - local vPC is down, forwarding via vPC peer-link

vPC domain id : 1
Peer status : peer adjacency formed ok
vPC keep-alive status : peer is alive
Configuration consistency status : success
Per-vlan consistency status : success
Type-2 consistency status : success
vPC role : secondary
Number of vPCs configured : 2
Peer Gateway : Disabled
Dual-active excluded VLANs : -
Graceful Consistency Check : Enabled
Auto-recovery status : Enabled (timeout = 240 seconds)

vPC Peer-link status
---------------------------------------------------------------------
id Port Status Active vlans
-- ---- ------ --------------------------------------------------
1 Po1 up 1

vPC status
----------------------------------------------------------------------------
id Port Status Consistency Reason Active vlans
------ ----------- ------ ----------- -------------------------- -----------
15 Po15 up success success 1
16 Po16 up success success 1

interface port-channel15
switchport mode trunk
speed 10000
vpc 15

interface port-channel16
switchport mode trunk
speed 10000
vpc 16


interface Ethernet2/15
switchport mode trunk
channel-group 15

interface Ethernet2/16
switchport mode trunk
channel-group 16

0 Helpful

Madhukrishnan Gopinathan Nair
Level 7
Level 7
In response to Gelliston

‎03-26-2016 11:31 PM

What is ur VTP status on 5K and 3750?

sh vtp 

Also from 5k, can you share the below

sh int po 15 trunk

0 Helpful

Gelliston
Level 1
Level 1
In response to Madhukrishnan Gopinathan Nair

‎03-27-2016 04:25 PM

I think I am making progress here.  It appears the VLANs are trunking now.  When I do a sh vlan on the 5Ks I get all my vlans.  However when I try to change an interface to access mode and assign a vlan that port does not work.  I attached the sh ru int eth2/1 below as well.

************************************

Nexus-5548UP-TOR-1(config-if)# sh vtp status
VTP Status Information
----------------------
VTP Version : 2 (capable)
Configuration Revision : 21
Maximum VLANs supported locally : 1005
Number of existing VLANs : 13
VTP Operating Mode : Server
VTP Domain Name : Cisco
VTP Pruning Mode : Disabled (Operationally Disabled)
VTP V2 Mode : Disabled
VTP Traps Generation : Disabled
MD5 Digest : 0x7D 0x11 0x1A 0x0B 0xBD 0x1D 0xB7 0xD0
Configuration last modified by 192.168.1.1 at 8-29-93 12:17:21
Local updater ID is 0.0.0.0
VTP version running : 1


Nexus-5548UP-TOR-1(config-if)# sh int po15 trunk

--------------------------------------------------------------------------------
Port Native Status Port
Vlan Channel
--------------------------------------------------------------------------------
Po15 1 trunking --

--------------------------------------------------------------------------------
Port Vlans Allowed on Trunk
--------------------------------------------------------------------------------
Po15 1-4094

--------------------------------------------------------------------------------
Port Vlans Err-disabled on Trunk
--------------------------------------------------------------------------------
Po15 3-7,10,20,104

--------------------------------------------------------------------------------
Port STP Forwarding
--------------------------------------------------------------------------------
Po15 1

--------------------------------------------------------------------------------
Port Vlans in spanning tree forwarding state and not pruned
--------------------------------------------------------------------------------

--------------------------------------------------------------------------------
Port Vlans Forwarding on FabricPath
--------------------------------------------------------------------------------
Po15 none

Nexus-5548UP-TOR-1(config-if)# sh int po16 trunk

--------------------------------------------------------------------------------
Port Native Status Port
Vlan Channel
--------------------------------------------------------------------------------
Po16 1 trunking --

--------------------------------------------------------------------------------
Port Vlans Allowed on Trunk
--------------------------------------------------------------------------------
Po16 1-4094

--------------------------------------------------------------------------------
Port Vlans Err-disabled on Trunk
--------------------------------------------------------------------------------
Po16 3-7,10,20,104

--------------------------------------------------------------------------------
Port STP Forwarding
--------------------------------------------------------------------------------
Po16 1

--------------------------------------------------------------------------------
Port Vlans in spanning tree forwarding state and not pruned
--------------------------------------------------------------------------------

--------------------------------------------------------------------------------
Port Vlans Forwarding on FabricPath
--------------------------------------------------------------------------------
Po16 none

*************************************

Nexus-5548UP-TOR-2(config-if)# sh vtp status
VTP Status Information
----------------------
VTP Version : 2 (capable)
Configuration Revision : 21
Maximum VLANs supported locally : 1005
Number of existing VLANs : 13
VTP Operating Mode : Server
VTP Domain Name : Cisco
VTP Pruning Mode : Disabled (Operationally Disabled)
VTP V2 Mode : Disabled
VTP Traps Generation : Disabled
MD5 Digest : 0x7D 0x11 0x1A 0x0B 0xBD 0x1D 0xB7 0xD0
Configuration last modified by 192.168.1.1 at 8-29-93 12:17:21
Local updater ID is 0.0.0.0
VTP version running : 1

Nexus-5548UP-TOR-2(config-if)# sh int po15 trunk

--------------------------------------------------------------------------------
Port Native Status Port
Vlan Channel
--------------------------------------------------------------------------------
Po15 1 trunking --

--------------------------------------------------------------------------------
Port Vlans Allowed on Trunk
--------------------------------------------------------------------------------
Po15 1-4094

--------------------------------------------------------------------------------
Port Vlans Err-disabled on Trunk
--------------------------------------------------------------------------------
Po15 3-7,10,20,104

--------------------------------------------------------------------------------
Port STP Forwarding
--------------------------------------------------------------------------------
Po15 1

--------------------------------------------------------------------------------
Port Vlans in spanning tree forwarding state and not pruned
--------------------------------------------------------------------------------

--------------------------------------------------------------------------------
Port Vlans Forwarding on FabricPath
--------------------------------------------------------------------------------
Po15 none

Nexus-5548UP-TOR-2(config-if)# sh int po16 trunk

--------------------------------------------------------------------------------
Port Native Status Port
Vlan Channel
--------------------------------------------------------------------------------
Po16 1 trunking --

--------------------------------------------------------------------------------
Port Vlans Allowed on Trunk
--------------------------------------------------------------------------------
Po16 1-4094

--------------------------------------------------------------------------------
Port Vlans Err-disabled on Trunk
--------------------------------------------------------------------------------
Po16 3-7,10,20,104

--------------------------------------------------------------------------------
Port STP Forwarding
--------------------------------------------------------------------------------
Po16 1

--------------------------------------------------------------------------------
Port Vlans in spanning tree forwarding state and not pruned
--------------------------------------------------------------------------------

--------------------------------------------------------------------------------
Port Vlans Forwarding on FabricPath
--------------------------------------------------------------------------------
Po16 none

*************************************

Core_Stack#sh vtp status
VTP Version capable : 1 to 3
VTP version running : 1
VTP Domain Name : Cisco
VTP Pruning Mode : Disabled
VTP Traps Generation : Enabled
Device ID : a44c.11ff.2600
Configuration last modified by 192.168.1.1 at 8-29-93 12:17:21
Local updater ID is 192.168.1.1 on interface Vl3 (lowest numbered VLAN interface found)

Feature VLAN:
--------------
VTP Operating Mode : Server
Maximum VLANs supported locally : 1005
Number of existing VLANs : 13
Configuration Revision : 21
MD5 digest : 0x7D 0x11 0x1A 0x0B 0xBD 0x1D 0xB7 0xD0
0xF2 0x39 0x28 0xEA 0x7A 0xE5 0x4D 0xB2

************


interface Ethernet2/1
switchport access vlan 3

0 Helpful

dukenuk96
Level 3
Level 3
In response to Gelliston

‎04-06-2016 02:57 AM

As you can see

Port Vlans Err-disabled on Trunk
--------------------------------------------------------------------------------
Po16 3-7,10,20,104

there is a problem on your N5k. Please share full network diagram and configurations of all devices, upload them as separate files for conviniency, please.

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