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• Rtr Virtual router port
•
Brg Virtual bridge port
•
Tnk Virtual trunk port (used for WAN)
•
T10 802.10 FDDI service port
•
FRT Frame Relay trunk port
•
Lne LAN Emulation service port
•
CIP Classical IP service port
•
Vlc VLAN Clusters (X-LANE) service port
Protocol. The bridging protocol for virtual ports and services or the routing protocol for virtual
router ports. Possible values are:
•
Tns Transparent bridge. Bridges maintain a dynamic table of known MAC
addresses on connected segments. The table is used to make forwarding deci-
sions. When a frame is received that contains a destination address that
matches an address in the table, it is forwarded to designated bridge ports
that are in forwarding state.
•
SR Source Routing Bridge. Normally used in Token Ring environments. Routing
information is determined by looking at the Routing Information Field (RIF) in
a frame. The RIF contains the segment and bridge numbers that create the
path to the destination.
•
SRT Source Routing Transparent. Normally used in Token Ring environments.
Allows Source Routing and Transparent bridges to coexist. The Source Rout-
ing Transparent Bridge will form a Spanning Tree with other Transparent
Bridges and Source Routing Transparent Bridges and will forward frames that
do not contain a Routing Information Field (RIF) to destinations reachable by
the Spanning Tree. If the bridge detects routing information in the RIF, it will
forward it the same way Source Routing bridges do.”
•
IP IP Routing Protocol. Routing Information Protocol (RIP) used to learn routes
from neighboring routers. You configure an IP router through the
crgp or
modvl commands. Other IP routing parameters can be set through the
Networking menu commands, which are described in Chapter 25, “IP Rout-
ing.”
•
IPX IPX Routing Protocol. Uses RIP to learn routes from neighboring routers and
the Service Advertising Protocol (SAP) to maintain a database of network
services for requesting workstations. Other IPX routing parameters can be set
through the Networking menu commands, which are described in Chapter 27,
“IPX Routing.”
•
FR Frame Relay IP Routing. WAN Routing Groups are configured slightly differ-
ent from other Groups. Frame Relay IP Routing is IP Routing with some
enhancements to account for the Frame Relay network.