Cisco 3700, SMC TigerSwitch, Linux and VLAN Problems
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Posted by on June 2, 2006, 12:44 am
Please log in for more thread options ^ | FastEth0/0 (WAN) +--------------+ | Cisco 3700 | +-----------+--+ | +-----------------+ FastEth0/1 | | SMC TigerSwitch | +--------------------------+-----------------+ FastEth0/1.1 Port 1 | Port 23 dot1Q 1 native | 192.168.100.1/24 +-------+ FastEth0/1.2 | dot1Q 2 | eth1 192.168.75.17/30 +-------+ 192.168.75.18/30 | Linux | +-------+ I'm trying to get VLAN tagging set up with a Cisco 3700 router, an SMC TigerSwitch 6724AL2 and a Linux box. The layout is as above. I have my VLAN configuration configured as follows on the TigerSwitch: (This is an 802.11Q configuration) vlan database vlan 1 name DefaultVlan media ethernet state active vlan 2 name RayVlan media ethernet state active ! interface ethernet 1/1 switchport native vlan 1 switchport mode trunk switchport allowed vlan add 1-2 tagged ! ... ! interface ethernet 1/23 switchport allowed vlan add 1-2 untagged switchport native vlan 2 ! interface vlan 1 ip address 192.168.100.2 255.255.255.0 ! >From what I understand packets leaving the Cisco destined for
192.168.75.18 should be tagged for VLAN 2. The SMC switch should send
the packet out Port 23 and remove the VLAN tagging since the port is configured as untagged. Packets coming in from the Linux box into Port 23 and destined for 192.168.75.17 should be tagged with VLAN 2 because of the "native vlan 2" configuration option on the port (basically any untagged packets are tagged for VLAN 2). The switch should send this packet through Port 1 and the Cisco sends it to the correct subinterface because of the VLAN tag. However, traffic is not passing as I expect it go. If I run a ping from the Cisco to 192.168.75.18 while running a tcpdump on the Linux box's eth1, I don't see the ICMP packets nor do I even see any ARP requests. Can anyone see anything obviously wrong with my setup? Maybe I have something conceptually wrong. Thanks, Ray | ||||||||||
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