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https://docs.ipinfusion.com/datacenter/index.html#page/OcNOS-DC_6.4.1/Layer3-Config/IS-IS-IPv4_Configurations.html#ww1045370

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Basic

Code Block

title	router isis

R2#show running-config router isis
!
router isis 1
 metric-style wide
 net 49.0000.0000.0001.00
!

loopback

Code Block

title	loopback

R2#show running-config interface lo
!
interface lo
 ip address 127.0.0.1/8
 ip address 10.1.1.1/32 secondary
 ipv6 address ::1/128
 ip router isis 1
!

network interface

Code Block

title	show interface eth1

R2#show running-config interface eth1
!
interface eth1
 ip address 10.1.1.100/31
 ip router isis 1
!

Show commands

Link

CLNS

Connectionless Network Protocol

CLNS is responsible for the connectionless delivery of data packets in the OSI network architecture.

CLNS is less used, and IP is the preferred Layer3

neighbors

show clns neighbors

show clns is-neighbors

Code Block

title	show ISIS
collapse	true

R2#show clns neighbors

Total number of L1 adjacencies: 1
Total number of L2 adjacencies: 1
Total number of adjacencies: 2
Tag 1:  VRF : default
System Id      Interface   SNPA                State  Holdtime  Type Protocol
0000.0000.0002 eth1        5000.0002.0001      Up     6         L1   IS-IS
                                               Up     6         L2   IS-IS


R2#show clns is-neighbors

Tag 1:  VRF : default
System Id      Interface   State  Type Priority  Circuit Id
0000.0000.0002 eth1        Up     L1   64        0000.0000.0002.02
                           Up     L2   64        0000.0000.0002.02

show isis

show isis interface

Code Block

title	show isis interface
collapse	true

R2>show isis interface
eth1 is up, line protocol is up
  Routing Protocol: IS-IS (1)
    Network Type: Broadcast
    Circuit Type: level-1-2
    Local circuit ID: 0x02
    Extended Local circuit ID: 0x00000003
    Local SNPA: 5000.0001.0001
    IP interface address:
      10.1.1.100/31
    IPv6 interface address:
      fe80::5200:ff:fe01:1/64
    Level-1 Metric: 10/10, Priority: 64, Circuit ID: 0000.0000.0002.02
    Number of active level-1 adjacencies: 1
    Level-1 LSP MTU: 1492
    Level-2 Metric: 10/10, Priority: 64, Circuit ID: 0000.0000.0002.02
    Number of active level-2 adjacencies: 1
    Level-2 LSP MTU: 1492
    Next IS-IS LAN Level-1 Hello in 6 seconds
    Next IS-IS LAN Level-2 Hello in 6 seconds
lo is up, line protocol is up
  Routing Protocol: IS-IS (1)
    Network Type: Loopback
    Circuit Type: level-1-2
    Local circuit ID: 0x01
    Extended Local circuit ID: 0x00000001
    IP interface address:
      10.1.1.1/32
      127.0.0.1/8
    IPv6 interface address:
      ::1/128
    Level-1 Metric: 10/10, Priority: 64, Circuit ID: 0000.0000.0000.00
    Number of active level-1 adjacencies: 0
    Level-1 LSP MTU: 1492
    Level-2 Metric: 10/10, Priority: 64, Circuit ID: 0000.0000.0000.00
    Number of active level-2 adjacencies: 0
    Level-2 LSP MTU: 1492

show isis database

show isis topology

Code Block

title	show isis
collapse	true

R2>show isis database
Tag 1:  VRF : default
IS-IS Level-1 Link State Database:
LSPID                 LSP Seq Num  LSP Checksum  LSP Holdtime      ATT/P/OL
0000.0000.0001.00-00* 0x00000006   0x42E7        731               0/0/0
0000.0000.0002.00-00  0x00000006   0x6EB8        740               0/0/0
0000.0000.0002.02-00  0x00000005   0x6F55        740               0/0/0

IS-IS Level-2 Link State Database:
LSPID                 LSP Seq Num  LSP Checksum  LSP Holdtime      ATT/P/OL
0000.0000.0001.00-00* 0x00000009   0xBA21        742               0/0/0
0000.0000.0002.00-00  0x00000008   0xB02A        745               0/0/0
0000.0000.0002.02-00  0x00000005   0x6F55        740               0/0/0

R2>show isis topology

Tag 1:  VRF : default
IS-IS paths to level-1 routers
System Id            Metric     Next-Hop             Interface   SNPA
0000.0000.0001       --
0000.0000.0002       10         0000.0000.0002       eth1        5000.0002.0001

IS-IS paths to level-2 routers
System Id            Metric     Next-Hop             Interface   SNPA
0000.0000.0001       --
0000.0000.0002       10         0000.0000.0002       eth1        5000.0002.0001

show ip route

show ip route [ isis ]

Code Block

title	show ip route
collapse	true

R2>show ip route
Codes: K - kernel, C - connected, S - static, R - RIP, B - BGP
       O - OSPF, IA - OSPF inter area
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2
       i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2,
       ia - IS-IS inter area, E - EVPN,
       v - vrf leaked
       * - candidate default

IP Route Table for VRF "default"
C            10.1.1.1/32 is directly connected, lo, 01:15:13
i L1         10.1.1.2/32 [115/20] via 10.1.1.101, eth1, 00:48:42
C            10.1.1.100/31 is directly connected, eth1, 2d21h53m
C            127.0.0.0/8 is directly connected, lo, 2d21h53m

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