Bay Networks BayRS Manual de usuario descargar pdf (Pagina 12)

Data Sheet BayStack Access Node and Access Node Hub12

Dynamic Software Builder and

Loader Site Manager’s Software

Builder works with the Dynamic

Loader of the BayStack AN and ANH

to preserve the routers’ Flash memory

and DRAM space. The Software

Builder allows software images to be

customized. Only required software

functionality is maintained in the

remote router’s software image. For

example, if a remote site requires

only IP and IPX support, other net-

work protocols can be deleted from

the software image to preserve Flash

memory space. The Dynamic Loader

feature preserves DRAM space by

loading to DRAM only the routing

functionality that is required by a

particular BayStack AN or ANH con-

ﬁguration. Using the previous exam-

ple, if a particular branch ofﬁce does

not require IPX support, then

Dynamic Loader will load only IP to

DRAM rather than the complete

software image of the BayStack AN.

Managed Hub Support

Complying with RFC 1516, both ANH

conﬁgurations support SNMP GET

and SET management for the moni-

toring and conﬁguration of individual

hub port statistics and operational

status information. In addition, the

BayStack ANH provides automatic

port partitioning to prevent a faulty

hub port from affecting the rest of the

network. When excessive collisions

on an individual hub port are detect-

ed, this feature “detaches” the prob-

lematic endstation. This allows

packets to be transmitted to the end-

station but does not permit the hub

port to accept packets sent from the

endstation. Once packet collisions

are no longer sensed, the hub port

is automatically returned to normal

operation.

Redundant Network

Interfaces

Bay Networks LAN interfaces can be

conﬁgured for 1-for-1 redundancy,

allowing two similar LAN interfaces in

the same router to be attached to a

single LAN. One of the interfaces is

designated primary and is fully opera-

tional while the other is in a non-

operational backup mode. If the

primary interface fails, the backup

interface becomes operational, ensur-

ing continued availability. IP, IPX,

and Source Route Bridging are sup-

ported by this feature.

Ethernet interfaces support a Hot

Standby feature, which enables a

backup interface to become opera-

tional very quickly. A Hot Standby

interface in backup mode collects

network information and uses it to

route trafﬁc in the event of a primary

interface failure. The Hot Standby

feature is intended for use on stub

networks.

Redundant Router Support

The routers support a redundant

router capability that provides protec-

tion against catastrophic events, such

as ﬁre or ﬂood, which may eliminate

any single router. In Router

Redundancy, two identical routers are

used. To apply router redundancy,

one of the routers is placed in

Primary mode and the other in

Backup mode. If the primary router

fails, the backup will become active

and resume routing trafﬁc. IP, IPX,

and Source Route Bridge are support-

ed by this feature.

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