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we have an HPE 1920 PoE switch connected to a Cisco 1841 router, vers 12.4. The HP switch has two VLANs:

  • Data - VLAN 1 - 192.168.50.0/24
  • Voice - VLAN 55 - 192.168.55.0/24

The port on the switch that uplinks to the router has VLAN 1 untagged and VLAN 55 tagged.

The router has two subinterfaces configured:

interface FastEthernet0/1.1
 encapsulation dot1Q 1 native
 ip address 192.168.50.254 255.255.255.0
 no snmp trap link-status
 no cdp enable
!
interface FastEthernet0/1.55
 encapsulation dot1Q 55
 ip address 192.168.55.1 255.255.255.0
 no snmp trap link-status
 no cdp enable

show vlans on the router shows No Virtual LANs configured.

There is connectivity on the default VLAN okay but not for the second VLAN, I'm not even able to ping the .55 subinterface from the switch.

Is there a way to get this working please?

  • what does a "show vlan" on the Cisco router tell? (you can edit your question to add the info). also please add the router model and IOS version. – JFL Jan 11 '17 at 13:22
  • Hi, thanks for the reply. There are no vlans on the router, I read somewhere that it uses subinterfaces rather than vlans as it is a routed port rather than a switched port..?! But that may be just my inexperience or misunderstanding... – Adam D Jan 11 '17 at 13:30
  • Where you defined VLANS? on switch or on router? – Nishad Morey Jan 11 '17 at 13:32
  • vlans on the switch and matching subinterfaces using dot1q encapsulation on the router – Adam D Jan 11 '17 at 13:34
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Check your switch configuration. You have to define the trk port for that VLAN to go outside. Example:

trunk 49-50 trk1

vlan [vlan_id] 
name "valn name"
untagged [port number that you want to untagged]
tagged Trk1
no ip address
exit
| improve this answer | |
  • do you need a trunk port? Isn't that just a group of ports acting as one in HP terminology, similar to a port-channel in Cisco – Adam D Jan 11 '17 at 13:38
  • U need to tell VLAN from where you want to go out. – Nishad Morey Jan 11 '17 at 14:09
  • the port that uplinks to the router is already tagged in the vlan: vlan 1 untagged 1-24 vlan 55 tagged 1-24 is that not the same thing? – Adam D Jan 11 '17 at 14:37
0

Thanks everyone but I found out what the issue was, the uplink port on the switch was enabled for Voice VLAN, as soon as I disabled this, it worked as expected.

| improve this answer | |
  • You should accept your answer to that the question doesn' keep popping up forever, looking for an answer. – Ron Maupin Feb 10 '17 at 19:46
  • Sorry bud, I'm not sure what you mean?! – Adam D Feb 10 '17 at 23:41
  • You accept answers that answer your question. This keeps the question in the site, but questions with no accepted answers periodically pop to the top of the questions list, looking for an answer. There should be large checks on the left side of the answers. You can check that on an answer that you accept, but only one answer can be accepted. See the tour. – Ron Maupin Feb 10 '17 at 23:45

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