Black Box LGB6026A, Management Manual

Page: 1118 / 1289

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C
HAPTER
47 | IP Routing Commands
Global Routing Configuration
show ipv6 route
This command displays information in the Forwarding Information Base
(FIB).
S
YNTAX
show ipv6 route [ ospf | rip | static | local | interface vlan vlan-id
| ipv6-address [/ prefix-length ]]
ospf – Displays external routes imported from the Open Shortest
Path First (OSPF) protocol into this routing domain.
rip – Displays all entries learned through the Routing Information
Protocol (RIP).
static – Displays all static entries.
local – Displays all entries for destinations attached directly to this
router.
interface – Displays all routes that be accessed through this
interface.
ipv6-address - A full IPv6 address including the network prefix and
host address bits.
prefix-length - A decimal value indicating how many contiguous bits
(from the left) of the address comprise the prefix (i.e., the network
portion of the address).
C
OMMAND
M
ODE
Privileged Exec
C
OMMAND
U
SAGE
◆
The FIB contains information required to forward IP traffic. It contains
the interface identifier and next hop information for each reachable
destination network prefix based on the IP routing table. When routing
or topology changes occur in the network, the routing table is updated,
and those changes are immediately reflected in the FIB.
The FIB is distinct from the routing table (or, Routing Information
Base), which holds all routing information received from routing peers.
The forwarding information base contains unique paths only. It does
not contain any secondary paths. A FIB entry consists of the minimum
amount of information necessary to make a forwarding decision on a
particular packet. The typical components within a forwarding
information base entry are a network prefix, a router port identifier,
and next hop information.
◆
This command only displays routes which are currently accessible for
forwarding. The router must be able to directly reach the next hop, so
the VLAN interface associated with any dynamic or static route entry
must be up.