Specifications

show isis database verbose
MP-555
Cisco IOS Multiprotocol Label Switching Command Reference
January 2010
Table 75 describes the significant fields shown in the display.
Ta b l e 75 show isis database verbose Field Descriptions
Field Description
LSPID Link-state packet (LSP) identifier. The first six octets form the System ID
o
f the router that originated the LSP.
The next octet is the pseudonode ID. When this byte is zero, the LSP
des
cribes links from the system. When it is nonzero, the LSP is a
pseudonode LSP. This is similar to a router LSA in Open Shortest Path First
(OSPF); the LSP describes the state of the originating router. For each
LAN, the designated router for that LAN creates and floods a pseudonode
LSP that describes all systems attached to that LAN.
The last octet is the LSP number. If all the data cannot fit into a single LSP,
t
he LSP is divided into multiple LSP fragments. Each fragment has a
different LSP number. An asterisk (*) indicates that the system issuing this
command originated the LSP.
LSP Seq Num LSP sequence number that allows other systems to determine if they
r
eceived the latest information from the source.
LSP Checksum Checksum of the entire LSP packet.
LSP Holdtime Amount of time that the LSP remains valid (in seconds). An LSP hold time
of ze
ro indicates that this LSP was purged and is being removed from all
routers’ link-state databases (LSDBs). The value indicates how long the
purged LSP will stay in the LSDB before it is completely removed.
ATT Attach bit. This bit indicates that the router is also a Level 2 router, and it
c
an reach other areas. Level 1 routers use the Attach bit to find the closest
Le
vel 2 router. They install a default route to the closest Level 2 router.
P P bit. This bit detects if the IS can repair area partitions. Cisco and other
v
endors do not support area partition repair.
OL Overload bit. This bit determines if the IS is congested. If the overload bit
i
s set, other routers do not use this system as a transit router when they
calculate routes. Only packets for destinations directly connected to the
overloaded router are sent to this router.
Area Address Reachable area addresses from the router. For Level 1 LSPs, these are the
ar
ea addresses configured manually on the originating router. For Level 2
LSPs, these are all the area addresses for the area to which this router
belongs.
NLPID Network Layer Protocol identifier.
Hostname Hostname of the node.
Router ID Traffic engineering router identifier for the node.
IP Address IPv4 address for the interface.
Metric IS-IS metric for the cost of the adjacency between the originating router and
t
he advertised neighbor, or the metric of the cost to get from the advertising
router to the advertised destination (which can be an IP address, an end
system (ES), or a connectionless network service [CLNS] prefix).
Affinity Link attribute flags that are being flooded.