I am experiencing issues assigning IP address when attempting to trunk multiple VLANs up to a single CISCO 2611 using subinterfaces.....
I have a CISCO 2611 XM and a CISCO 3548 XL...I am trying to use FA 0/0 with subinterfaces (2611) and vlan access [desired ports] (3548) to carry multiple VLANs.
192.168.100.0/24 [VLAN 100 on the 3548]
192.168.200.0/24 [VLAN 200 on the 3548]
int fa 0/0.1
encap dot1q 100
ip address 192.168.100.0 255.255.255.0
int fa 0/0.2
encap dot1q 200
ip address 192.168.200.0 255.255.255.0
int fa 0/1
switchport mode trunk (allowed all)
int fa 0/3
switchport mode access
switchport access vlan 100
I do not have any speed/duplex issues or any up/down issues.....I have dhcp pools setup for both and dhcp-server/networks setup per VLAN (problem ???)....I currently have no L3 management IP established on the 3548 so int VLAN1 remains up up....Obviously as soon as I revert back to a single network on fa 0/0 with no sub-ifs it works fine.
I have seen several proposed solution regarding "secondary" interfaces resolving several peoples issues with physical interface limitations but unfortunately that hasn't worked for me.