User`s guide

Configuring
3-43
networks like Ethernet and FDDI. RIF is not supported on
Ethernet networks and is seldom used on FDDI networks. In order
to merge source routed Token Ring networks with transparent
Ethernet or FDDI networks the ATX must strip the RIF when
communicating to Ethernet or FDDI and insert the RIF when
communicating back to Token Ring. Source route networks contain
the following features and parameters:
• SRTB is a global parameter and is enabled only on Token Ring
ports with SRT bridging mode.
• The RIF database will support 8,192 entries.
• SRTB can be enabled based on protocols IP, IPX and Other(SNA,
NetBIOS, etc...).
• All existing protocol translations(IP, IPX, SNA, NetBIOS and
AppleTalk) will be supported when SRTB is enabled.
• The RIF caching aging timer is the same as the Spanning Tree
timer, configurable and defaults to 300 seconds.
• The RIF cache entry is relearned based on a separate timer that
is set to one half the Spanning Tree timer.
• A redundant/load sharing Source Route network is NOT
supported when SRTB(RIF caching) is enabled. A
redundant/load sharing SR network could have multiple paths
to the Transparent network and cause the learning database to
learn addresses on the incorrect ports. This could result in
frames not getting forwarded and loss of communication. See
Example #4.
3.16.1 Managing SRTB
SRTB [{ip | ipx | other |all}{on | off} ][ste |
are]
IP - enables stripping and caching of RIF on IP frames
IPX - enables stripping and caching of RIF on IPX frames