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IES-612-51 User’s Guide

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CHAPTER 52

IP Bridge Commands

The IP bridge function is designed for large-scale, flat, access networks, and it is ideal when

the network is based on Ethernet. When the IP bridge is enabled, the IES-612-51 forwards

frames based on the destination IP address, instead of the destination MAC address, and it

replaces the source MAC address with its own MAC address.

You can follow these steps to set up a simple IP bridge.

1 Create a domain. (Each domain is an ISP.)

2 Create one or more VLANs in the domain.

3 Specify one or more edge routers for the domain.

4 Create routing table entries, so the IES-612-51 forwards frames to the appropriate edge

router.

5 Create downlink interfaces, so the IES-612-51 forwards frames to the appropriate

subscribers.

6 Create PVCs for the subscribers.

52.1 IP Bridge Command Input Values

The following table describes the values required in IP bridge commands. Other values are

discussed with the corresponding commands.

Table 129 IP Bridge Command Input Values

LABEL DESCRIPTION

domain-name The name of the domain. You can use 1-31 printable ASCII characters. Spaces

are allowed, but you must use double quotation marks (“) to enclose the name.

(You must use a back slash (\) before double quotation marks in the name itself.)

vlan-id The ID (<1~4094>) of the VLAN.

join|leave Specifies whether you want to add the specified VLAN to (join) or remove the

specified VLAN from (leave) the domain.

ip-address IP address, in dotted decimal notation.

mask-bits Number of bits <1~32> in the subnet mask.

nexthop IP address, in dotted decimal notation.

metric The metric <1~15> represents the “cost” of transmission for routing purposes. IP

routing uses hop count as the measurement of cost, with a minimum of 1 for

directly-connected networks. Select the number that approximates the cost for

this link The number need not be precise, but it must be between 1 and 15. In

practice, 2 or 3 is usually a good number.

If two entries have the same metric, the IES-612-51 uses the one with the lower

IP address.

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ZyXEL Communications IES-612-51A Betriebsanweisung Seite 321