HP 24S Guia do Utilizador descarregar pdf (Página 76)

Limitations

Each hub can monitor a single backup link (only one backup link can be

configured on each hub). But, the hub may be at the remote end of one backup

link and at the monitoring end of a backup link to a different hub.

A given hub should be connected to the remote end of no more than two backup

links. If it is functioning as the remote hub in more than two backup links, it may

not be able to respond to the test packets fast enough when there is a high level of

data traffic on the network segments.

This limit may be exceeded by increasing the time between test packet

transmissions on the monitoring hubs. For all the backup links in which the

remote hub is involved, the time configured on the monitoring hubs for those links

should be increased by one second for each additional backup link beyond two

links. Add one to this count if the remote hub is also functioning as a primary

hub in a different link.

Additional Notes

Any port on the hub can be used for either the primary link or the backup link.

Any combination of media types can be used. For example, a thin coax link from

the ThinLAN port can act as a backup link to a twisted-pair link using one of the

hub’s twisted-pair ports. A transceiver attached to the hub’s AUI port can provide

a primary or backup link over any type medium (twisted-pair, coax, or fiber-optic

cable). (See “Sample Topologies” later in this appendix.)

The primary link and the backup link cabling should be run over different paths

(through different conduits, for example) to reduce the possibility that damage

will occur to both cables simultaneously.

E-2 Backup Links

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HP 24S Guia do Utilizador Página 76