Zyxel IES-6000 [269/1156] Ip bridge settings

Zyxel IES-5106 [269/1156] Ip bridge settings
Chapter 10 Subscriber Port Setup Screens
Management Switch Card User’s Guide
269
10.14.2 IP Bridge Settings
The IP bridge function consists of the following settings.
Domains and VLANs
Edge routers
Downlink interfaces
Routing tables
•PVCs
ARP proxy settings
Each set of settings is discussed in more detail in the following sections.
10.14.2.1 Domains and VLAN
A domain represents an ISP. Each domain is defined by (and dominates) the VLAN that are in it and
has its own routing table and ARP table. As a result, two or more VLANs in different domains can
use the same IP subnet, and one network can support multiple ISPs.
VLANs in IP bridges are exclusive. They can be in at most one domain. In addition, VLANs in IP
bridges share the same VLAN space as regular VLANs, so VLANs in IP bridges must have different
VLAN IDs than regular VLANs.
10.14.2.1.1 Configuring VLANs for Domains
To add a VLAN to a domain,
1 Add (Join) a new (undefined) VLAN ID to the domain.
2 Create the VLAN in the system using the regular screens or commands for VLANs.
To remove a VLAN from a domain,
1 Delete the VLAN from the system using the regular screens or commands for VLANs.
2 Remove (Leave) the VLAN ID from the domain.
10.14.2.2 Edge Routers
Edge routers are usually the gateways that are provided to the subscribers. They can also be
gateways that are specified in static routing table entries. Each edge router, in addition to its IP
address, has an associated VLAN ID. When the MSC forwards a frame to an edge router, it uses this
VLAN ID to replace whatever VLAN ID the subscriber specified. The MSC also uses the VLAN ID to
identify the domain the edge router is in.
If two edge routers are in different domains, it is possible for them to have the same IP address.
10.14.2.3 Downlink Interfaces
Downlink interfaces provide forwarding information for downstream traffic. The MSC learns some of
this information by snooping DHCP packets. For static IP addresses, you should provide this
information manually. In this case, specify the VLAN ID and, optionally, the PVC for a range of IP

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