VLAN Tagging on Cisco 2924 Switch
Posted on 2011-03-06
I am trying to troubleshoot a device connectivity issue which consists of a CPE which tags traffic on it's WAN interface with VLAN 35. I can see the tag in a Wireshark capture. According to the vendor, I need to configure the switch to tag the traffic on VLAN 35 for the WAN interconnect & then strip the VLAN tag on the interface that will send traffic outbound from the switch. So, basically, CPE WAN port connects to tagged port on the 2924 (port 1) and then traffic leaving the switch on port 13 will strip the tag. I've been trying to get this working but just having a whale of a time.
If I do a packet capture I see the DHCP requests with an 802.1Q section with the ID of 35.
Any ideas? The switch is running older code - 12.0(5.4).
The engineer for the device followed up with this:
"Cisco2924 should work for this.
Setup one port on 2924 as 802.1Q Trunking port and connect it to R1000H WAN Ethernet.
Setup one port on 2924 with ingress VLAN tag 35 (egress traffic shouldn’t have any VLAN) and connect it to HDM."
I can setup the 802.1Q trunking port - what exactly is the configuration for the other ingress port?