Setup Guide

Field Description
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 EMC
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.
DellEMC# 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
!
DellEMC# 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
Metric: 10 IPv6 (MT-IPv6) 2511::/64
Metric: 10 IPv6 (MT-IPv6) 1011::/64
Metric: 10 IPv6 1511::/64
Metric: 10 IP 10.1.1.0 255.255.255.0
Hostname: ISIS
IS-IS Level-2 Link State Database
LSPID LSP Seq Num LSP Checksum LSP Holdtime ATT/P/OL
ISIS.00-00 * 0x0000002D 0xB2CD 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 10.1.1.0 255.255.255.0
Metric: 10 IP 15.1.1.0 255.255.255.0
Metric: 20 IP 10.3.3.0 255.255.255.0
Metric: 10 IPv6 (MT-IPv6) 1011::/64
Metric: 10 IPv6 (MT-IPv6) 1511::/64
Metric: 10 IPv6 (MT-IPv6) 2511::/64
Metric: 20 IPv6 (MT-IPv6) 1033::/64
Intermediate System to Intermediate System (IS-IS)
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