Table 28 WAN Backup Advanced Setup
LABEL | DESCRIPTION |
|
|
Advanced | Click the Edit button to display the Advanced Modem Setup screen and edit the |
Modem Setup | details of your dial backup setup. |
TCP/IP Options |
|
|
|
Metric | This field sets this route's priority among the three routes the ZyXEL Device uses |
| (normal, traffic redirect and dial backup). Type a number (1 to 15) to set the priority |
| of the dial backup route for data transmission. The smaller the number, the higher |
| the priority. |
| If the three routes have the same metrics, the priority of the routes is as follows: |
| WAN, Traffic Redirect, Dial Backup. |
Enable SUA | Network Address Translation (NAT) allows the translation of an Internet protocol |
| address used within one network to a different IP address known within another |
| network. |
| SUA (Single User Account) is a subset of NAT that supports two types of mapping: |
| |
Enable RIP | Select this check box to turn on RIP (Routing Information Protocol), which allows a |
| router to exchange routing information with other routers. |
RIP Version | The RIP Version field controls the format and the broadcasting method of the RIP |
| packets that the ZyXEL Device sends (it recognizes both formats when receiving). |
| Choose |
| |
| probably adequate for most networks, unless you have an unusual network |
| topology. Both |
| difference being that |
| multicasting. Multicasting can reduce the load on |
| generally do not listen to the RIP multicast address and so will not receive the RIP |
| packets. However, if one router uses multicasting, then all routers on your network |
| must use multicasting, also. |
RIP Direction | RIP (Routing Information Protocol) allows a router to exchange routing information |
| with other routers. The RIP Direction field controls the sending and receiving of RIP |
| packets. |
| Choose Both, In Only or Out Only. |
| When set to Both or Out Only, the ZyXEL Device will broadcast its routing table |
| periodically. |
| When set to Both or In Only, the ZyXEL Device will incorporate RIP information |
| that it receives. |
Enable Multicast | Select this check box to turn on IGMP (Internet Group Multicast Protocol). IGMP is |
| a |
| not used to carry user data. |
Multicast | Select |
| version 1 (RFC 1112) but IGMP version 1 is still in wide use. If you would like to |
| read more detailed information about interoperability between IGMP version 2 and |
| version 1, please see sections 4 and 5 of RFC 2236. |
PPP Options |
|
|
|
Encapsulation | Select CISCO PPP from the |
| Cisco PPP encapsulation; otherwise select Standard PPP. |
Compression | Select this check box to enable stac compression. |
|
|
Connection |
|
|
|
Select | |
Connection | ZyXEL Device will try to bring up the connection automatically if it is disconnected. |
104 | Chapter 5 WAN Setup |