Dell C9000 series, Reference Manual

Page: 1109 / 2286

Field Description
The designated router for a LAN creates and floods a
pseudonode LSP and describes the attached systems.
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 1-2 router and can reach other areas. Level 1-
only routers and Level 1-2 routers that have lost connection to
other Level 1-2 routers use the Attach bit to find the closest
Level 1-2 router. They install a default route to the closest Level
1-2 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.
Dell#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
!
Dell#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
Intermediate System to Intermediate System (IS-IS) 1109