IP Router Configuration 
Router Configuration Guide 251
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Instance       Router Name                      ECMP    Max-ECMP-   Weight ECMP
                                                        Rtes        
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1              Base                             True    32          True
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fib
Syntax fib slot-number [family] [ip-prefix/prefix-length] [longer] [secondary] [exclude-services]
fib slot-number [family] summary 
fib slot-number nh-table-usage
Context show>router
Description This command displays the active FIB entries for a specific IOM or linecard.
Parameters slot-number — Displays routes only matching the specified chassis slot number.
Default all IOMs
Values 1 to 10
family — Displays the router IP interface table to display.
Values ipv4 — Displays only those peers that have the IPv4 family 
enabled.
ipv6 — Displays the peers that are IPv6-capable.
ip-prefix/prefix-length — Displays FIB entries only matching the specified ip-prefix and length.
Values The following values apply to the 7450 ESS:
Values The following values apply to the 7750 SR and 7950 XRS:
longer — Displays FIB entries matching the ip-prefix/mask and routes with longer masks.
secondary — Displays secondary VRF ID information.
summary — Displays summary FIB information for the specified slot number.
ipv4-prefix: a.b.c.d (host bits must be 0)
ipv4-prefix-length: 0 to 32
ipv4-prefix: a.b.c.d (host bits must be 0)
ipv4-prefix-length: 0 to 32
ipv6-prefix: x:x:x:x:x:x:x:x (eight 16-bit pieces)
x:x:x:x:x:x:d.d.d.d
x: [0 to FFFF]H
d: [0 to 255]D
ipv6-prefix-length: 0 to 128