Reference Guide

Field Description
The last octet is the LSP number. An LSP is divided into multiple LSP
fragments if there is more data than cannot fit in a single LSP. Each
fragment has a unique LSP number.
An * after the LSPID indicates that the system originates an LSP
where this command was issued.
LSP Seq Num This value is the sequence number for the LSP that allows other
systems to determine if they have received the latest information
from the source.
LSP Checksum This is the checksum of the entire LSP packet.
LSP Holdtime This value is the amount of time, in seconds, that the LSP remains
valid. A zero holdtime indicates that this is a purged LSP and is being
removed from the link state database. A value between brackets
indicates the duration that the purged LSP stays in the database
before being removed.
ATT This value represents the Attach bit. This value indicates that the
router is a Level 2 router and can reach other areas. Level 1-only
routers and Level 1-2 routers that have lost connection to other Level
2 routers use the Attach bit to find the closest Level 2 router. They
point a default route to the closest Level 2 router.
P This value represents the P bit. This bit is always set to zero as Dell
Networking does not support area partition repair.
OL This value represents the overload bit, determining congestion. If the
overload bit is set, other routers do not use this system as a transit
router when calculating routes.
Example
The bold sections identify that MultiTopology IS-IS is enabled.
FTOS#show isis database
IS-IS Level-1 Link State Database
LSPID LSP Seq Num LSP Checksum LSP Holdtime ATT/P/OL
ISIS.00-00 * 0x00000006 0xCF43 580 0/0/0
IS-IS Level-2 Link State Database
LSPID LSP Seq Num LSP Checksum LSP Holdtime ATT/P/OL
ISIS.00-00 * 0x00000006 0xCF43 580 0/0/0
!
FTOS#show isis database detail ISIS.00-00
IS-IS Level-1 Link State Database
LSPID LSP Seq Num LSP Checksum LSP Holdtime ATT/P/OL
ISIS.00-00 * 0x0000002B 0x853B 1075 0/0/0
Area Address: 49.0000.0001
NLPID: 0xCC 0x8E
IP Address: 10.1.1.1
IPv6 Address: 1011::1
Topology: IPv4 (0x00) IPv6 (0x8002)
Metric: 10 IS OSPF.00
Metric: 10 IS (MT-IPv6) OSPF.00
Metric: 10 IP 15.1.1.0 255.255.255.0
Metric: 10 IPv6 (MT-IPv6) 1511::/64
804