ZyXEL Communications IES-1248-51 Guia do Utilizador descarregar pdf (Página 290)

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Chapter 38 IP Bridge

IES-1248-51V User’s Guide

290

Edge Router IP Enter the IP address to which the IES-1248-51V forwards frames if

the destination IP address of a packet is in the specified range.

If this IP address corresponds to an edge router in the edge router

screen (see Section 38.4 on page 284), the IES-1248-51V uses the

associated VLAN ID. In addition,

• If the edge router is in the same domain as the entry, the entry is used for upstream

traffic.

• If the edge router is in a different domain than the entry, the entry is used for

downstream traffic.

If the specified edge router is not set up in the edge router screen, the

IES-1248-51V uses the entry for downstream traffic and does not

change the VLAN ID.

Priority Use the drop-down list box to select the priority value (0 to 7) to add

to incoming frames without a (IEEE 802.1p) priority tag.

Metric The metric 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-1248-51V uses the one

with the lower IP address.

Add Click Add to create the routing table entry. It is then displayed in the

summary table at the bottom of the screen.

Clicking Add saves your changes to the IES-1248-51V’s volatile

memory. The IES-1248-51V loses these changes if it is turned off or

loses power, so use the Config Save link on the navigation panel to

save your changes to the non-volatile memory when you are done

configuring.

Cancel Click Cancel to start configuring the screen again.

Show Domain Select a domain for which you wish to view information.

Show Current

Routes

Click this to look at the routing table(s) for the selected domain(s).

This table includes all the entries, whether added automatically by the

IES-1248-51V or provided manually. (See Section 38.6.1 on page

291.)

The bottom section displays routing table entries created manually. It

does not show entries added automatically by the IES-1248-51V.

Index This field displays the number of the entry.

NetMask

This field displays the IP address and the number of bits in the subnet

mask that define the range of IP addresses to which this entry applies.

If the destination IP address of a packet is in this range, the IES-

1248-51V forwards the frame to the specified edge router.

Edge Router IP This field displays the IP address to which the IES-1248-51V forwards

frames if the destination IP address of a packet is in the specified

range.

Metric This field displays the “cost” of transmission for routing purposes.

Table 92 IPB Routing Table (continued)

LABEL DESCRIPTION

1 2 ... 285 286 287 288 289 290 291 292 293 294 295 ... 653 654

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