Jim Schilling
asked on
Tagged Vlan traffic does not seem to reach DHCP server (and/or possibly back again)
Hi All,
So we are trying to tag traffic on one specific Vlan (vlan 10) in our network. However when we do this, the traffic does not seem to reach another vlan (vlan 70) that has the DHCP server on it. Below is a rough layout of the network, with snippets of what I think are the relevant parts of config:
Wireless AP (Meraki MR42 - this is what is actually tagging the traffic to vlan 10).
AP plugged into Cisco 2960X Layer 2 stacked:
If Vlan tagging is disabled, everything works perfect. But as soon as vlan tagging is enabled it no workie.
I'm not really sure what I need to do next. Any assistance would be greatly appreciated.
Please bear in mind I do not configure Cisco's on a daily basis and am barely up to CCNA level.
Thanks!
So we are trying to tag traffic on one specific Vlan (vlan 10) in our network. However when we do this, the traffic does not seem to reach another vlan (vlan 70) that has the DHCP server on it. Below is a rough layout of the network, with snippets of what I think are the relevant parts of config:
Wireless AP (Meraki MR42 - this is what is actually tagging the traffic to vlan 10).
AP plugged into Cisco 2960X Layer 2 stacked:
interface GigabitEthernet1/0/20
switchport access vlan 10
switchport trunk native vlan 10
switchport trunk allowed vlan 10
switchport mode trunk
!
Which is sent via this: interface Port-channel4
description ALS_STACK->DLS1
switchport mode trunk
switchport nonegotiate
!
interface GigabitEthernet1/0/47
switchport mode trunk
switchport nonegotiate
channel-group 4 mode active
!
to a Cisco 3650 Layer 3 in a redundant setupinterface Port-channel4
description DLS1->ALS_STACK
switchport mode trunk
switchport nonegotiate
!
interface GigabitEthernet1/0/5
switchport mode trunk
switchport nonegotiate
channel-group 4 mode active
!
interface Vlan10
ip address 10.0.10.252 255.255.255.0
ip helper-address 192.168.0.48
standby 10 ip 10.0.10.254
standby 10 priority 120
standby 10 preempt
!
interface Vlan70
ip address 192.168.0.252 255.255.255.0
ip helper-address 192.168.0.48
standby 70 ip 192.168.0.248
!
This is then sent to a top of rack switchinterface Port-channel2
description Trunk->R2GSW1
switchport mode trunk
!
interface GigabitEthernet1/0/13
switchport mode trunk
channel-group 2 mode active
!
To which the DHCP server is plugged.interface GigabitEthernet0/2
description DHCP
switchport access vlan 70
switchport mode access
!
interface Port-channel2
switchport mode trunk
!
If Vlan tagging is disabled, everything works perfect. But as soon as vlan tagging is enabled it no workie.
I'm not really sure what I need to do next. Any assistance would be greatly appreciated.
Please bear in mind I do not configure Cisco's on a daily basis and am barely up to CCNA level.
Thanks!
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