I am configuring a 877 ADSL router. According to the spec pages it SHOULD support 2 VLANS - one for DMZ - with the base image. However whenever I try and add a VLAN I get a 'maximum number of VLANs reached' message and the VLAN isn't added. The unit has a fairly old software release (12.4(4)T) but I can't see anythingin the release notes for the newer images to suggest that there is a 'fix' in there...
From this page:
"VLAN Support for 2 VLANs with Base Image. One VLAN dedicated to DMZ."