Dell Command Line Reference Guide for the S4048–ON System 9.14.2.4

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show isis database

Display the IS-IS link state database.

Syntax
show isis [vrf vrf-name] database [level-1 | level-2] [local] [detail | summary] [system-id] [lspid]
Parameters
vrf vrf-name
(Optional) Enter the keyword vrf followed by the name of the VRF to display IS-IS link state database corresponding to that VRF.
NOTE: If you do not specify this option, the IS-IS link state database corresponding to the default VRF are displayed.
level-1
(OPTIONAL) Displays the Level 1 IS-IS link-state database.
level-2
(OPTIONAL) Displays the Level 2 IS-IS link-state database.
local
(OPTIONAL) Displays local link-state database information.
detail
(OPTIONAL) Displays the detailed link-state database information of each LSP when specified. If not specified, a summary displays.
summary
(OPTIONAL) Displays the summary of link-state database information when specified.
lspid
(OPTIONAL) Display only the specified LSP.
system-id
(OPTIONAL) Displays the link-state database for system-id.
Command Modes
  • EXEC
  • EXEC Privilege
Command History

This guide is platform-specific. For command information about other platforms, see the relevant Dell EMC Networking OS Command Line Reference Guide.

Version
Description
9.10(0.1)
Introduced on the S6010-ON and S4048T-ON.
9.10(0.0)
Introduced on the S3148.
9.10(0.0)
Introduced on the S6100–ON.
9.8(2.0)
Introduced on the S3100 series.
9.8(1.0)
Introduced on the Z9100–ON.
9.8(0.0P5)
Introduced on the S4048-ON.
9.8(0.0P2)
Introduced on the S3048-ON.
9.7(0.0)
Added supported for VRF. Introduced on the S6000-ON.
9.5(0.1)
Introduced on the Z9500.
9.2(0.2)
Introduced on the Z9000.
9.0.2.0
Introduced on the S6000.
8.3.19.0
Introduced on the S4820T.
8.3.7.1
Introduced on the S4810.
Usage Information
The following describes the show isis database command shown in the following example.
Field
Description
IS-IS Level-1/Level-2 Link State Database
Displays the IS-IS link state database for Level 1 or Level 2.
LSPID

Displays the LSP identifier.

The first six octets are the System ID of the originating router.

The first six octets are the System ID of the originating router. The next octet is the pseudonode ID. If this byte is not zero, the LSP describes system links. If this byte is zero (0), the LSP describes the state of the originating router.

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 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
  Metric: 10   IPv6 2511::/64
  Metric: 20   IPv6 1033::/64
  Hostname: ISIS

DellEMC# show isis database detail
IS-IS Level-1 Link State Database
LSPID                 LSP Seq Num  LSP Checksum  LSP Holdtime      ATT/P/OL
FTOS.00-00          * 0x00000009   0x79D8        941               1/0/0
  NLPID:        0xCC
  Area Address: 49.0000.0001

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