Displaying Forwarding Information Base(Fib) Table; Forwarding Information Base(Fib) Retain - Siemens S223 User Manual

User Manual
SURPASS hiD 6615 S223/S323 R1.5
4.3.5
4.3.6
A50010-Y3-C150-2-7619
The following is an example of configuring static route to reach three destinations, which
are not directly connected.
SWITCH(config)# ip route 100.1.1.0/24 10.1.1.2
SWITCH(config)# ip route 200.1.1.0/24 20.1.1.2
SWITCH(config)# ip route 172.16.1.0/24 30.1.1.2
To display configured static route, use the following command.
Command
{A.B.C.D
show ip route
A.B.C.D/M | bgpㅣconnectedㅣ
isisㅣkernelㅣospfㅣripㅣstatic |
summary | static}
show ip route database static

Displaying Forwarding Information Base(FIB) Table

The FIB is a table that contains a mirror image of the forwarding information in the IP rout-
ing table. When routing or topology changes occur in the network the route processor up-
dates the IP routing table and CEF updates the FIB. Because there is a one-to-one corre-
lation between FIB entries and routing table entries, the FIB contains all known routes
and eliminates the need for route cache maintenance that is associated with switching
paths, such as fast switching and optimum switching. FIB is used for making IP destina-
tion prefix-based switching decisions and maintaining next-hop address information
based on the information in the IP routing table.
The forwarding information base (FIB) table contains information that the forwarding
processors require to make IP forwarding decisions.
To display Forwarding Information Base table, use the following command.
Command
show ip route fib

Forwarding Information Base(FIB) Retain

Use this command to modify the retain time for stale routes in the Forwarding Information
Base (FIB) during NSM restart.
Command
fib retain
{forever | time <1-65535>}
no fib retain
{forever | time <1-65535>}
Mode
|
Shows configured routing information.
Enable
Global
Shows configured routing information with IP routing
table database.
Mode
Enable
Global Displays Forwarding Information Base table.
Bridge
Mode
Configures the retain time for FIB during NSM restart
Default: 60sec
Global
Restores is as a default
UMN:CLI
Description
Description
Description
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