3

I try to create a Vlan that route traffic through multiple Cisco Devices. For that I create a vlan13 on each device and setup a IP on the ISR and the Device attached to the Nexus also have a IP on the same subnet.

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The setup is like this:

ISR 4451:

interface Vlan13
 description pfsense subnet
 ip address 10.1.1.49 255.255.255.240
end
interface Ethernet-Internal1/0/0
 description Trunk to internal switch module
 switchport trunk allowed vlan 1,11,13
 switchport mode trunk
end

SM-X

interface Vlan13
 ip address 10.1.1.51 255.255.255.240
end
interface GigabitEthernet0/2
 switchport trunk encapsulation dot1q
 switchport trunk allowed vlan 1,13
 switchport mode trunk
end
interface GigabitEthernet0/52
 switchport trunk encapsulation dot1q
 switchport mode trunk
 switchport protected
end

Nexus 3000

vlan 1,13
interface Ethernet1/16
  switchport access vlan 13
interface Ethernet1/47

I try to add switchport trunk encapsulation dot1q to the nexus config but the command is unavailable. Maybe this is the issue of my config. The Server attached to the Eth1/16 Port is configured with IP 10.1.1.50/28 and the IP 10.1.1.49 or 10.1.1.51 is not accessible from that server.

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3
  • 1
    You need switchport mode trunk on Nexus Ethernet1/47. The encapsulation command is not needed as the Nexus always encapsulates. – user36472 Jan 19 '18 at 7:26
  • Thx, now it works. – kockiren Jan 19 '18 at 7:32
  • I'm glad it worked. I've converted my comment to an answer. :-) – user36472 Jan 19 '18 at 7:35
5

Converting comment to answer.

Ethernet1/47 was missing switchport mode trunk. The Nexus 3000 does not need an encapsulation command as it always encapsulates traffic on trunk ports.

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