Specifications

Advanced Gateway Configurations
Cox Business Internet Gateway Admin Guide 77
Advanced Gateway Configurations
The Cisco 3829AD gateway is capable of supporting VLANs (Virtual Local Area Networks)
configured to any of the 4 wired interfaces or wireless SSIDs. The gateway is also capable of
supporting bridged mode for the entire gateway or individual wired interfaces (referred to as
Mixed Mode). The VLAN, Bridge Mode and Mixed Modes can only be enabled by Cox
Communications; these are not advised for majority of business use cases where these
configurations are needed will be extremely rare. If you required these configurations please
contact Cox Business customer care. Cox can remotely enable these capabilities however it is
the responsibility of the customer administrator to configure and manage the settings to meet
their business needs. Cox will only enable the features.
Virtual Local Area Network
The Virtual Local Area Network (VLAN) feature set is used to logically group LAN side network
interfaces to create a VLAN. Each VLAN creates a network broadcast domain and provides
traffic isolation between other VLANs configured.
Customers have requested this type of LAN side port isolation for additional security
(Ethernet/Wi-Fi) as well as the ability to forward or route traffic from specific ports back to Layer
3 routers and switches on the network side.
Note: In the current architecture, VLAN tags cannot be added or stripped for packets
traversing the Wi-Fi interfaces due to performance concerns. However, if the Wi-Fi-
connected CPE adds a VLAN tag, it can be prioritized into an upstream service flow. The
current software implementation does not support VLAN double tagging (Q-in-Q
tagging).
The current VLAN implementation only supports IPv4 subnets and addresses. The VLANs are
interface-based. Each interface on the router can be assigned a unique VLAN ID—or multiple
interfaces can be grouped and assigned to the same VLAN ID. However, a specific interface
cannot be a member of more than one VLAN.
VLAN IDs in the range of 2 to 1005 are possible. By default, all interfaces are a member of the
default VLAN ID = 1. Firewall and UpNP are configurable per VLAN via the GUI settings.