IS-IS Operational Commands
IS-IS Show Commands
The IS-IS show commands provide detailed information about the IS-IS protocol operation and IS-IS routes.
IS-IS Overview
Syntax:
show isis overview
| Option | Description |
|---|---|
- |
Without any option, this command displays a summary of all the IS-IS instances |
Example: Summary view of all the IS-IS instances
supervisor@rtbrick>spine1: op> show isis overview Instance: default System ID: 1921.6800.1001 System hostname: isr1 Areas: 49.0001/24 Neighbor hold time: 30 sec LSP life time: 65535 sec Overload bit set: False SRGB base: 1000 SRGB range: 1000 SRGB label values: 1000 - 1999 SRLB base: 2000 SRLB range: 1000 SRLB label values: 2000 - 2999 Authentication: Level 1: md5, Level 2: md5
IS-IS Interface
Syntax:
show isis interface <option>
| Option | Description |
|---|---|
- |
Without any option, this command displays a summary of all the IS-IS interfaces |
instance |
Displays IS-IS interface information for an instance |
statistics |
Displays IS-IS interface statistics information |
detail |
Displays detailed output for all interfaces. |
Example 1: Summary view of the IS-IS interfaces
supervisor@rtbrick>spine1: op> show isis interface
Instance: default
Interface Level Adjacencies Metric Type Passive LDP-sync
lo-0/0/0/0 1 0 1000000 loopback 1 -
lo-0/0/0/0 2 0 1000000 loopback 1 -
ifl-0/0/2/0 2 1 1000000 point-to-point 0 -
ifl-0/0/2/1 1 2 1000000 broadcast 0 -
ifl-0/0/2/1 2 2 1000000 broadcast 0 -Example 2: Summary view of the IS-IS interfaces for a specific instance
supervisor@rtbrick>spine1: op> show isis interface instance default
Instance: default
Interface Level Adjacencies Metric Type Passive LDP-sync
lo-0/0/0/0 1 0 1000000 loopback 1 -
lo-0/0/0/0 2 0 1000000 loopback 1 -
ifl-0/0/2/0 2 1 1000000 point-to-point 0 -
ifl-0/0/2/1 1 2 1000000 broadcast 0 -
ifl-0/0/2/1 2 2 1000000 broadcast 0 -Example 3: Summary view of the IS-IS interfaces for a specific interface
supervisor@rtbrick>spine1: op> show isis interface ifl-0/0/2/0
Instance: default
Interface: ifl-0/0/2/0, Level: 1
Type: point-to-point, Passive: False
Metric: 1000000
Hello interval: 10 seconds, Hello multiplier: 3, Hold time: 30 seconds
Adjacencies: 1
CNSP in: 0, CNSP out: 2446, CNSP success: 1222, CNSP fail: 0
PSNP in: 0, PSNP out: 0, PSNP success: 0, PSNP fail: 0
LSP in: 0, LSP out: 0, LSP success: 0, LSP fail: 0, LSP in purge: 0 LSP in auth fail: 0
IIH in: 1134, IIH out: 1138
Interface: ifl-0/0/2/0, Level: 2
Type: point-to-point, Passive: False
Metric: 1000000
Hello interval: 10 seconds, Hello multiplier: 3, Hold time: 30 seconds
Adjacencies: 1
CNSP in: 0, CNSP out: 2446, CNSP success: 1222, CNSP fail: 0
PSNP in: 0, PSNP out: 0, PSNP success: 0, PSNP fail: 0
LSP in: 0, LSP out: 0, LSP success: 0, LSP fail: 0, LSP in purge: 0 LSP in auth fail: 0
IIH in: 1134, IIH out: 1138Example 4: Summary view of the IS-IS interface statistics
supervisor@rtbrick>spine1: op> show isis interface statistics
Instance: default
Interface Level CSNP In CSNP Out CSNP Fail PSNP In PSNP Out PSNP Fail LSP In LSP Out LSP Fail IIH In
IIH Out
lo-0/0/0/0 1 0 0 0 0 0 0 0 0 0 0
0
lo-0/0/0/0 2 0 0 0 0 0 0 0 0 0 0 0
ifl-0/0/2/0 1 0 2454 0 0 0 0 0 0 0 1138
1142
ifl-0/0/2/0 2 0 2454 0 0 0 0 0 0 0 1138
1142
ifl-0/0/2/1 1 0 0 0 0 0 0 3 1 0 2288
2285
ifl-0/0/2/1 2 0 0 0 0 0 0 4 1 0 2288 2285Example 5: Detailed output of the IS-IS interface
supervisor@rtbrick>spine1: op> show isis interface detail
Instance: default
Interface: lo-0/0/0/0, Level: 1
Type: loopback, Passive: True
Metric: 1000000
Hello interval: 10 seconds, Hello multiplier: 3, Hold time: 30 seconds
Adjacencies: 0
CNSP in: 0, CNSP out: 0, CNSP success: 0, CNSP fail: 0
PSNP in: 0, PSNP out: 0, PSNP success: 0, PSNP fail: 0
LSP in: 0, LSP out: 0, LSP success: 0, LSP fail: 0, LSP in purge: 0 LSP in auth fail: 0
IIH in: 0, IIH out: 0
Interface: lo-0/0/0/0, Level: 2
Type: loopback, Passive: True
Metric: 1000000
Hello interval: 10 seconds, Hello multiplier: 3, Hold time: 30 seconds
Adjacencies: 0
CNSP in: 0, CNSP out: 0, CNSP success: 0, CNSP fail: 0
PSNP in: 0, PSNP out: 0, PSNP success: 0, PSNP fail: 0
LSP in: 0, LSP out: 0, LSP success: 0, LSP fail: 0, LSP in purge: 0 LSP in auth fail: 0
IIH in: 0, IIH out: 0
Instance: default
Interface: ifl-0/0/2/0, Level: 1
Type: point-to-point, Passive: False
Metric: 1000000
Hello interval: 10 seconds, Hello multiplier: 3, Hold time: 30 seconds
Adjacencies: 1
CNSP in: 0, CNSP out: 2460, CNSP success: 1229, CNSP fail: 0
PSNP in: 0, PSNP out: 0, PSNP success: 0, PSNP fail: 0
LSP in: 0, LSP out: 0, LSP success: 0, LSP fail: 0, LSP in purge: 0 LSP in auth fail: 0
IIH in: 1141, IIH out: 1145
Interface: ifl-0/0/2/0, Level: 2
Type: point-to-point, Passive: False
Metric: 1000000
Hello interval: 10 seconds, Hello multiplier: 3, Hold time: 30 seconds
Adjacencies: 1
CNSP in: 0, CNSP out: 2460, CNSP success: 1229, CNSP fail: 0
PSNP in: 0, PSNP out: 0, PSNP success: 0, PSNP fail: 0
LSP in: 0, LSP out: 0, LSP success: 0, LSP fail: 0, LSP in purge: 0 LSP in auth fail: 0
IIH in: 1141, IIH out: 1145
<...>Example 5: Detailed output of an IS-IS interface that supports broadcast
supervisor@rtbrick>spine1: op> show isis interface ifl-0/0/2/1
Instance: default
Interface: ifl-0/0/2/1, Level: 1
Type: broadcast, Passive: False, Circuit ID: 0x1
Metric: 1000000, Priority: 64
Hello interval: 10 seconds, Hello multiplier: 3, Hold time: 30 seconds
Designated IS: isr6.01(1921.6800.1006.01)
Adjacencies: 2
CNSP in: 0, CNSP out: 0, CNSP success: 1238, CNSP fail: 0
PSNP in: 0, PSNP out: 0, PSNP success: 0, PSNP fail: 0
LSP in: 3, LSP out: 1, LSP success: 3, LSP fail: 0, LSP in purge: 0 LSP in auth fail: 0
IIH in: 2304, IIH out: 2301
Interface: ifl-0/0/2/1, Level: 2
Type: broadcast, Passive: False, Circuit ID: 0x1
Metric: 1000000, Priority: 64
Hello interval: 10 seconds, Hello multiplier: 3, Hold time: 30 seconds
Designated IS: isr6.01(1921.6800.1006.01)
Adjacencies: 2
CNSP in: 0, CNSP out: 0, CNSP success: 1238, CNSP fail: 0
PSNP in: 0, PSNP out: 0, PSNP success: 0, PSNP fail: 0
LSP in: 4, LSP out: 1, LSP success: 4, LSP fail: 0, LSP in purge: 0 LSP in auth fail: 0
IIH in: 2304, IIH out: 2301
supervisor@rtbrick>spine1: op>IS-IS Neighbor
Syntax:
show isis neighbor <option>
| Option | Description |
|---|---|
- |
Without any option, this command displays a summary of all the IS-IS neighbors |
detail |
Displays detailed information for IS-IS neighbor |
instance |
Displays IS-IS neighbor information for an instance |
Example 1: Summary view of the IS-IS neighbor
supervisor@rtbrick>spine1: op> show isis neighbor
Instance: default
Interface System Level State Type Up since Expires
ifl-0/0/2/0 isr6 L1L2 Up P2P Thu Jul 25 05:40:05 in 18s 750197us
ifl-0/0/2/1 isr6 L1 Up Broadcast Thu Jul 25 05:39:58 in 26s 728457us
ifl-0/0/2/1 isr6 L2 Up Broadcast Thu Jul 25 05:39:58 in 29s 729531usExample 2: Detailed view of the IS-IS neighbor
supervisor@S1-STD-17-1703: cfg> show isis neighbor detail
Instance: default
System: isr6, Interface: ifl-0/0/2/0
State: Up, Level: L1L2, Adjacency type: P2P
Hold time: 30.0s, Expiry time: in 29s 780091us
Local IPv4 address: 16.0.1.1, Remote IPv4 address: 16.0.1.6
Local IPv6 address: fe80::7807:2dff:fec0:2, Remote IPv6 address: fe80::7847:eff:fec0:0
Up since: Thu Jul 25 05:40:05 GMT +0000 2024, Last down reason: NA
Last transition: 2024-07-25T05:40:05.778348+0000, Number of transitions: 2
Error counters:
Level mismatch: 0, Area mismatch: 0, System ID: 0, Subnet mismatch: 0
Hold timeout: 0, Neighbor down: 0, Interface down: 0, Admin reset: 0
Interface configuration: 0, Area configuration: 0, Other: 0
System: isr6, Interface: ifl-0/0/2/1
State: Up, Level: L1L2, Adjacency type: Broadcast
Hold time: 30.0s, Expiry time: in 24s 779280us
Priority: 64, Designated IS: 1921.6800.1006.01, SNPA: 7a:47:0e:c0:00:00
Local IPv4 address: 16.0.2.1, Remote IPv4 address: 16.0.2.6
Local IPv6 address: fe80::7807:2d00:1c0:2, Remote IPv6 address: fe80::7847:e00:1c0:0
Up since: Thu Jul 25 05:39:58 GMT +0000 2024, Last down reason: NA
Last transition: 2024-07-25T05:39:58.725007+0000, Number of transitions: 3
Error counters:
Level mismatch: 0, Area mismatch: 0, System ID: 0, Subnet mismatch: 0
Hold timeout: 0, Neighbor down: 0, Interface down: 0, Admin reset: 0
Interface configuration: 0, Area configuration: 0, Other: 0
<...>Example 3: Summary view of the IS-IS neighbor for the specified instance
supervisor@rtbrick>spine1: op> show isis neighbor instance default
Instance: default
Interface System Level State Type Up since Expires
ifl-0/0/2/0 isr6 L1L2 Up P2P Thu Jul 25 05:40:05 in 21s 893028us
ifl-0/0/2/1 isr6 L1 Up Broadcast Thu Jul 25 05:39:58 in 26s 848320us
ifl-0/0/2/1 isr6 L2 Up Broadcast Thu Jul 25 05:39:58 in 24s 845934us
supervisor@rtbrick>spine1: op>Example 4: Detailed view of the IS-IS neighbor for the specified instance
supervisor@rtbrick>spine1: op> show isis neighbor instance default detail
Instance: default
System: isr6, Interface: ifl-0/0/2/0
State: Up, Level: L1L2, Adjacency type: P2P
Hold time: 30.0s, Expiry time: in 21s 155501us
Local IPv4 address: 16.0.1.1, Remote IPv4 address: 16.0.1.6
Local IPv6 address: fe80::7807:2dff:fec0:2, Remote IPv6 address: fe80::7847:eff:fec0:0
Up since: Thu Jul 25 05:40:05 GMT +0000 2024, Last down reason: NA
Last transition: 2024-07-25T05:40:05.778348+0000, Number of transitions: 2
Error counters:
Level mismatch: 0, Area mismatch: 0, System ID: 0, Subnet mismatch: 0
Hold timeout: 0, Neighbor down: 0, Interface down: 0, Admin reset: 0
Interface configuration: 0, Area configuration: 0, Other: 0
System: isr6, Interface: ifl-0/0/2/1
State: Up, Level: L1L2, Adjacency type: Broadcast
Hold time: 30.0s, Expiry time: in 23s 150249us
Priority: 64, Designated IS: 1921.6800.1006.01, SNPA: 7a:47:0e:c0:00:00
Local IPv4 address: 16.0.2.1, Remote IPv4 address: 16.0.2.6
Local IPv6 address: fe80::7807:2d00:1c0:2, Remote IPv6 address: fe80::7847:e00:1c0:0
Up since: Thu Jul 25 05:39:58 GMT +0000 2024, Last down reason: NA
Last transition: 2024-07-25T05:39:58.725007+0000, Number of transitions: 3
Error counters:
Level mismatch: 0, Area mismatch: 0, System ID: 0, Subnet mismatch: 0
Hold timeout: 0, Neighbor down: 0, Interface down: 0, Admin reset: 0
Interface configuration: 0, Area configuration: 0, Other: 0
<...>Designated IS (DIS) Election History
In IS-IS broadcast networks, the Designated Intermediate System (DIS) is elected to optimize the distribution of routing information, reducing network overhead by coordinating the flooding of Link State Packets (LSPs) among multiple routers. This ensures efficient and stable network operation. The following command displays the DIS election history in RBFS.
Syntax:
show isis dis-election history <attribute> <value>
| Option | Description |
|---|---|
- |
Without any option, this command displays a summary of all the IS-IS. |
instance |
Displays DIS history information for the specified instance. |
interface <interface-name> |
Displays IS-IS DIS history information for the specified interface. |
level [level-1/level-2] |
Displays IS-IS DIS history information for the specified level. |
Example: Summary view of IS-IS DIS Election History
supervisor@rtbrick>spine1: op> show isis dis-election history
Instance: default, Interface: ifl-0/0/2/1, Level: 1
Timestamp DIS Event
Thu Jul 25 05:39:58 GMT +0000 2024 - Neighbour 1921.6800.1006 adjacency state changed from Init to Up
Thu Jul 25 05:39:58 GMT +0000 2024 1921.6800.1006.01 Neighbour 1921.6800.1006 DIS changed from 0000.0000.0000.00 to 1921.6800.1006.01
Instance: default, Interface: ifl-0/0/2/1, Level: 2
Timestamp DIS Event
Thu Jul 25 05:39:58 GMT +0000 2024 - Neighbour 1921.6800.1006 adjacency state changed from Init to Up
Thu Jul 25 05:39:58 GMT +0000 2024 1921.6800.1006.01 Neighbour 1921.6800.1006 DIS changed from 0000.0000.0000.00 to 1921.6800.1006.01IS-IS Hostname
Syntax:
show isis hostname
| Option | Description |
|---|---|
- |
Without any option, this command displays a summary of all the IS-IS dynamic hostnames |
Example: Summary view of IS-IS hostnames
supervisor@rtbrick>spine1: op> show isis hostname
Instance System-ID Hostname
default 1921.6800.1001 isr1
default 1921.6800.1006 isr6
default 1921.6800.1006 isr6
supervisor@rtbrick>spine1: op>IS-IS Database
Syntax:
show isis database <option>
| Option | Description |
|---|---|
- |
Without any option, this command displays all the IS-IS databases |
detail |
Displays detailed information for IS-IS database |
instance |
Displays IS-IS database information for an instance |
lsp <lsp-id> |
Displays a summary of IS-IS database for the specified LSP ID. This command includes an option for entering the system ID part either by hostname or by ID. |
[level-1/level-2] lsp |
Displays a summary of IS-IS database LSP information for specified level |
system <system-id> |
Displays a summary of IS-IS database for all LSPs from a system |
[level-1/level-2] system |
Displays a summary of IS-IS database for all LSPs from a system on the specified level. |
[level-1/level-2] detail |
Displays detailed information for the specified level |
Example 1: Summary view of the IS-IS Database
supervisor@S1-STD-7-7001>bm01-tst.fsn.rtbrick.net: op> show isis database
Instance: default, Level: 1
LSP ID Sequence Checksum Lifetime Overload Attached
isr1.00-00 0x4 0xe035 52785 0 0
isr6.00-00 0x3 0xe281 52785 0 0
isr6.01-00 0x1 0x4b1a 52778 0 0
Instance: default, Level: 2
LSP ID Sequence Checksum Lifetime Overload Attached
isr1.00-00 0x6 0x75af 52785 0 0
isr6.00-00 0x5 0x117e 52785 0 0
isr6.01-00 0x1 0x4b1a 52778 0 0Example 2: Summary view of the IS-IS database for the specified LSP
supervisor@rtbrick>spine1: op> show isis database lsp 1921.6800.1001.00-00
Instance: default, Level: 1
LSP ID: isr1.00-00
Interface:
LSP Header:
Sequence: 0x4
Checksum: 0xe035
Remaining lifetime: 65535 seconds
Flags: Attached: 0, Overload: 0
Packet:
Length: 182 bytes
Last received time: 2024-07-25T05:40:05.989755+0000
Expiry: expires in 14h 39m 11s 284549us
System ID: 1921.6800.1001
Dynamic Hostname TLV (137): isr1
Protocols Supported TLVs (129):
Network layer protocol ID: IPv6
Network layer protocol ID: IPv4
Area Address TLVs (1):
Area address: 49.0001
IS Reachability TLVs (22):
IS neighbor: 1921.6800.1006.00 Metric: 1000000
IS neighbor: 1921.6800.1006.01 Metric: 1000000
IPv4 Reachability TLVs (135):
IPv4 prefix: 16.0.1.0/24 Metric: 1000000 Internal Up
IPv4 prefix: 16.0.2.0/24 Metric: 1000000 Internal Up
IPv4 prefix: 192.168.1.1/32 Metric: 1000000 Internal Up SID: 100 Flags: Node
IPv6 Reachability TLVs (236):
IPv6 prefix: 16:0:1::/64 Metric: 1000000 Internal Up
IPv6 prefix: 16:0:2::/64 Metric: 1000000 Internal Up
IPv6 prefix: 192:168:1::1/128 Metric: 1000000 Internal Up SID: 102 Flags: Node
Segment Routing TLVs (242/sub 2):
SRGB: Base: 1000, Range: 1000, Router ID: 192.168.1.1
<...>Example 3: Detailed view of the IS-IS database for level-1
supervisor@rtbrick>spine1: op> show isis database level-1 detail
Instance: default, Level: 1
LSP ID: isr1.00-00
Interface:
LSP Header:
Sequence: 0x4
Checksum: 0xe035
Remaining lifetime: 52682 seconds
Flags: Attached: 0, Overload: 0
Packet:
Length: 182 bytes
Last received time: 2024-07-25T05:40:05.989755+0000
Expiry: expires in 14h 38m 2s 951316us
System ID: 1921.6800.1001
Dynamic Hostname TLV (137): isr1
Protocols Supported TLVs (129):
Network layer protocol ID: IPv6
Network layer protocol ID: IPv4
Area Address TLVs (1):
Area address: 49.0001
IS Reachability TLVs (22):
IS neighbor: 1921.6800.1006.00 Metric: 1000000,
IS neighbor: 1921.6800.1006.01 Metric: 1000000,
IPv4 Reachability TLVs (135):
IPv4 prefix: 16.0.1.0/24 Metric: 1000000 Internal Up
IPv4 prefix: 16.0.2.0/24 Metric: 1000000 Internal Up
IPv4 prefix: 192.168.1.1/32 Metric: 1000000 Internal Up SID: 100 Flags: Node
IPv6 Reachability TLVs (236):
IPv6 prefix: 16:0:1::/64 Metric: 1000000 Internal Up
IPv6 prefix: 16:0:2::/64 Metric: 1000000 Internal Up
IPv6 prefix: 192:168:1::1/128 Metric: 1000000 Internal Up SID: 102 Flags: Node
Segment Routing TLVs (242/sub 2):
SRGB: Base: 1000, Range: 1000, Router ID: 192.168.1.1
LSP ID: isr6.00-00
Interface: ifl-0/0/2/1
LSP Header:
Sequence: 0x3
Checksum: 0xe281
Remaining lifetime: 52682 seconds
Flags: Attached: 0, Overload: 0
Packet:
Length: 182 bytes
Last received time: 2024-07-25T05:40:05.786957+0000
Expiry: expires in 14h 38m 2s 748444us
System ID: 1921.6800.1006
Dynamic Hostname TLV (137): isr6
Protocols Supported TLVs (129):
Network layer protocol ID: IPv6
Network layer protocol ID: IPv4
Area Address TLVs (1):
Area address: 49.0001
IS Reachability TLVs (22):
IS neighbor: 1921.6800.1001.00 Metric: 1000000,
IS neighbor: 1921.6800.1006.01 Metric: 1000000,
IPv4 Reachability TLVs (135):
IPv4 prefix: 16.0.1.0/24 Metric: 1000000 Internal Up
IPv4 prefix: 16.0.2.0/24 Metric: 1000000 Internal Up
IPv4 prefix: 192.168.1.6/32 Metric: 1000000 Internal Up SID: 600 Flags: Node
IPv6 Reachability TLVs (236):
IPv6 prefix: 16:0:1::/64 Metric: 1000000 Internal Up
IPv6 prefix: 16:0:2::/64 Metric: 1000000 Internal Up
IPv6 prefix: 192:168:1::6/128 Metric: 1000000 Internal Up SID: 601 Flags: Node
Segment Routing TLVs (242/sub 2):
SRGB: Base: 6000, Range: 1000, Router ID: 192.168.1.6
<...>Example 4: Summary view of the IS-IS database for the specified instance
supervisor@rtbrick>spine1: op> show isis database instance default
Instance: default, Level: 1
LSP ID Sequence Checksum Lifetime Overload Attached
isr1.00-00 0x4 0xe035 52625 0 0
isr6.00-00 0x3 0xe281 52625 0 0
isr6.01-00 0x1 0x4b1a 52618 0 0
Instance: default, Level: 2
LSP ID Sequence Checksum Lifetime Overload Attached
isr1.00-00 0x6 0x75af 52625 0 0
isr6.00-00 0x5 0x117e 52625 0 0
isr6.01-00 0x1 0x4b1a 52618 0 0Example 5: Summary view of the IS-IS database for the specified instance and LSP
supervisor@rtbrick>spine1: op> show isis database instance default lsp 1921.6800.1001.00-00
Instance: default, Level: 1
LSP ID: isr1.00-00
Interface:
LSP Header:
Sequence: 0x4
Checksum: 0xe035
Remaining lifetime: 65535 seconds
Flags: Attached: 0, Overload: 0
Packet:
Length: 182 bytes
Last received time: 2024-07-25T05:40:05.989755+0000
Expiry: expires in 14h 36m 35s 357028us
System ID: 1921.6800.1001
Dynamic Hostname TLV (137): isr1
Protocols Supported TLVs (129):
Network layer protocol ID: IPv6
Network layer protocol ID: IPv4
Area Address TLVs (1):
Area address: 49.0001
IS Reachability TLVs (22):
IS neighbor: 1921.6800.1006.00 Metric: 1000000
IS neighbor: 1921.6800.1006.01 Metric: 1000000
IPv4 Reachability TLVs (135):
IPv4 prefix: 16.0.1.0/24 Metric: 1000000 Internal Up
IPv4 prefix: 16.0.2.0/24 Metric: 1000000 Internal Up
IPv4 prefix: 192.168.1.1/32 Metric: 1000000 Internal Up SID: 100 Flags: Node
IPv6 Reachability TLVs (236):
IPv6 prefix: 16:0:1::/64 Metric: 1000000 Internal Up
IPv6 prefix: 16:0:2::/64 Metric: 1000000 Internal Up
IPv6 prefix: 192:168:1::1/128 Metric: 1000000 Internal Up SID: 102 Flags: Node
Segment Routing TLVs (242/sub 2):
SRGB: Base: 1000, Range: 1000, Router ID: 192.168.1.1
<...>IS-IS Route
Syntax:
show isis route <option>
| Option | Description |
|---|---|
- |
Without any option, this command displays a summary of the IS-IS route information |
instance |
Displays IS-IS route information for an instance |
<afi> <safi> |
Routing information for the specified AFI/SAFI. Supported SAFI values are 'unicast' and 'labeled-unicast'. |
Example 1: Summary view of the IS-IS routes
supervisor@rtbrick>spine1: op> show isis route
Instance: default, AFI: ipv4, SAFI: unicast
Prefix Level Metric Type Next Hop Interface
16.0.1.0/24 1 1000000 Internal n/a local
16.0.2.0/24 1 1000000 Internal n/a local
192.168.1.1/32 1 1000000 Internal n/a local
192.168.1.6/32 1 2000000 Internal 16.0.2.6 ifl-0/0/2/1
16.0.1.6 ifl-0/0/2/0
Instance: default, AFI: ipv4, SAFI: labeled-unicast
Prefix Level Metric SID Index Next Hop Interface Label
192.168.1.6/32 1 2000000 600 16.0.2.6 ifl-0/0/2/1
16.0.1.6 ifl-0/0/2/0
Instance: default, AFI: ipv6, SAFI: unicast
Prefix Level Metric Type Next Hop Interface
16:0:1::/64 1 1000000 Internal n/a local
16:0:2::/64 1 1000000 Internal n/a local
192:168:1::1/128 1 1000000 Internal n/a local
192:168:1::6/128 1 2000000 Internal fe80::7847:eff:fec0:0 ifl-0/0/2/0
<...>Example 2: Summary view of the IS-IS routes for the specified instance
supervisor@rtbrick>spine1: op> show isis route instance default
Instance: default, AFI: ipv4, SAFI: unicast
Prefix Level Metric Type Next Hop Interface
16.0.1.0/24 1 1000000 Internal n/a local
16.0.2.0/24 1 1000000 Internal n/a local
192.168.1.1/32 1 1000000 Internal n/a local
192.168.1.6/32 1 2000000 Internal 16.0.2.6 ifl-0/0/2/1
16.0.1.6 ifl-0/0/2/0
Instance: default, AFI: ipv4, SAFI: labeled-unicast
Prefix Level Metric SID Index Next Hop Interface Label
192.168.1.6/32 1 2000000 600 16.0.2.6 ifl-0/0/2/1
16.0.1.6 ifl-0/0/2/0
Instance: default, AFI: ipv6, SAFI: unicast
Prefix Level Metric Type Next Hop Interface
16:0:1::/64 1 1000000 Internal n/a local
16:0:2::/64 1 1000000 Internal n/a local
192:168:1::1/128 1 1000000 Internal n/a local
192:168:1::6/128 1 2000000 Internal fe80::7847:eff:fec0:0 ifl-0/0/2/0
fe80::7847:e00:1c0:0 ifl-0/0/2/1
<...>Example 3: Summary view of the IS-IS routes for the specified instance and address family (IPv4 unicast).
supervisor@rtbrick>spine1: op> show isis route instance default ipv4 unicast
Instance: default, AFI: ipv4, SAFI: unicast
Prefix Level Metric Type Next Hop Interface
16.0.1.0/24 1 1000000 Internal n/a local
16.0.2.0/24 1 1000000 Internal n/a local
192.168.1.1/32 1 1000000 Internal n/a local
192.168.1.6/32 2000000 Internal 16.0.2.6 ifl-0/0/2/1
16.0.1.6 ifl-0/0/2/0Example 4: Summary view of the IS-IS routes for the specified instance and address family (IPv4 labeled-unicast).
supervisor@rtbrick>spine1: op> show isis route instance default ipv4 labeled-unicast
Instance: default, AFI: ipv4, SAFI: labeled-unicast
Prefix Level Metric SID Index Next Hop Interface Label
192.168.1.6/32 1 2000000 600 16.0.2.6 ifl-0/0/2/1
16.0.1.6 ifl-0/0/2/0Example 5: Summary view of the IS-IS routes for the specified instance and address family (IPv6 unicast).
supervisor@rtbrick>spine1: op> show isis route instance default ipv6 unicast
Instance: default, AFI: ipv6, SAFI: unicast
Prefix Level Metric Type Next Hop Interface
16:0:1::/64 1 1000000 Internal n/a local
16:0:2::/64 1 1000000 Internal n/a local
192:168:1::1/128 1 1000000 Internal n/a local
192:168:1::6/128 1 2000000 Internal fe80::7847:eff:fec0:0 ifl-0/0/2/0
fe80::7847:e00:1c0:0 ifl-0/0/2/1IS-IS Segment Routing
Syntax:
show isis segment-routing <option>
| Option | Description |
|---|---|
global-block |
Displays Segment routing global block (SRGB) information |
global-block instance <instance> |
Displays Segment routing global block (SRGB) information for the specified instance |
label-binding |
Displays the IS-IS segment routing label bindings information |
label-binding instance <instance> |
Displays the IS-IS segment routing label bindings for the specified instance |
prefix-segment |
Displays the IS-IS prefix segments information |
prefix-segment <instance> |
Displays the IS-IS prefix segments for the specified instance |
adjacency-segment |
Displays the IS-IS segment routing adjacency SIDs |
Example 1: Summary view of the IS-IS segment routing global block
supervisor@rtbrick>spine1: op> show isis segment-routing global-block
Instance: default, Level: 1
System SRGB Base SRGB Range
isr1 1000 1000
isr6 6000 1000
Instance: default, Level: 2
System SRGB Base SRGB Range
isr1 1000 1000
isr6 6000 1000Example 2: Summary view of the IS-IS segment routing label binding
supervisor@rtbrick>spine1: op> show isis segment-routing label-binding
Instance: default, Level: 1
System Prefix Range SID Flags
Instance: default, Level: 2
System refix Range SID FlagsExample 3: Summary view of the IS-IS segment routing prefix segment
supervisor@rtbrick>spine1: op> show isis segment-routing prefix-segment
Instance: default, Level: 1
System Prefix SID Flags
isr1 192.168.1.1/32 100 Node
isr1 192:168:1::1/128 102 Node
isr6 192.168.1.6/32 600 Node
isr6 192:168:1::6/128 601 Node
Instance: default, Level: 2
System Prefix SID Flags
isr1 192.168.1.1/32 100 Node
isr1 192.168.1.6/32 600 Re-advertisement, Node
isr1 192:168:1::1/128 102 Node
isr1 192:168:1::6/128 601 Re-advertisement, Node
isr6 192.168.1.1/32 100 Re-advertisement, Node
isr6 192.168.1.6/32 600 Node
isr6 192:168:1::1/128 102 Re-advertisement, Node
isr6 192:168:1::6/128 601 NodeExample 4: Summary view of the IS-IS segment routing adjacency-segment
supervisor@S1-STD-17-1703: cfg> show isis segment-routing adjacency-segment
Instance: default, Level: 1, No adjacency-segments
Instance: default, Level: 2, No adjacency-segmentsIS-IS SPF
Syntax:
show isis spf <option>
| Option | Description |
|---|---|
result |
Displays a summary of the IS-IS SPF results |
result <instance> |
Displays a summary of the IS-IS SPF results for the specified instance |
result [level-1/level2] |
Displays a summary of the IS-IS SPF results for the specified level. |
Example 1: Summary view of the IS-IS SPF result
supervisor@rtbrick>spine1: op> show isis spf result
Instance: default, Level: 1
Destination Node Metric Neighbor Node Interface Nexthop Address
1921.6800.1001.00 0 local
1921.6800.1006.00 1000000 1921.6800.1006.00 ifl-0/0/2/0 IPv6 fe80::7847:eff:fec0:0
1921.6800.1006.00 ifl-0/0/2/1 IPv6 fe80::7847:e00:1c0:0
1921.6800.1006.00 ifl-0/0/2/0 IPv4 16.0.1.6
1921.6800.1006.00 ifl-0/0/2/1 IPv4 16.0.2.6
1921.6800.1006.01 1000000 local
Instance: default, Level: 2
Destination Node Metric Neighbor Node Interface Nexthop Address
1921.6800.1001.00 0 local
1921.6800.1006.00 1000000 1921.6800.1006.00 ifl-0/0/2/0 IPv6 fe80::7847:eff:fec0:0
1921.6800.1006.00 ifl-0/0/2/1 IPv6 fe80::7847:e00:1c0:0
1921.6800.1006.00 ifl-0/0/2/0 IPv4 16.0.1.6
1921.6800.1006.00 ifl-0/0/2/1 IPv4 16.0.2.6
1921.6800.1006.01 1000000 localExample 2: Summary view of the IS-IS SPF result for level-1
supervisor@rtbrick>spine1: op> show isis spf result level-1
Instance: default, Level: 1
Destination Node Metric Neighbor Node Interface Nexthop Address
1921.6800.1001.00 0 local
1921.6800.1006.00 1000000 1921.6800.1006.00 ifl-0/0/2/0 IPv6 fe80::7847:eff:fec0:0
1921.6800.1006.00 ifl-0/0/2/1 IPv6 fe80::7847:e00:1c0:0
1921.6800.1006.00 ifl-0/0/2/0 IPv4 16.0.1.6
1921.6800.1006.00 ifl-0/0/2/1 IPv4 16.0.2.6
1921.6800.1006.01 1000000 localExample 3: Summary view of the IS-IS SPF result for level-2
supervisor@rtbrick>spine1: op> show isis spf result level-2
Instance: default, Level: 2
Destination Node Metric Neighbor Node Interface Nexthop Address
1921.6800.1001.00 0 local
1921.6800.1006.00 1000000 1921.6800.1006.00 ifl-0/0/2/0 IPv6 fe80::7847:eff:fec0:0
1921.6800.1006.00 ifl-0/0/2/1 IPv6 fe80::7847:e00:1c0:0
1921.6800.1006.00 ifl-0/0/2/0 IPv4 16.0.1.6
1921.6800.1006.00 ifl-0/0/2/1 IPv4 16.0.2.6
1921.6800.1006.01 1000000 localExample 4: Summary view of the IS-IS SPF result of a specific instance for level-1
supervisor@rtbrick>spine1: op> show isis spf result instance default level-1
Instance: default, Level: 1
Destination Node Metric Neighbor Node Interface Nexthop Address
1921.6800.1001.00 0 local
1921.6800.1006.00 1000000 1921.6800.1006.00 ifl-0/0/2/0 IPv6 fe80::7847:eff:fec0:0
1921.6800.1006.00 ifl-0/0/2/1 IPv6 fe80::7847:e00:1c0:0
1921.6800.1006.00 ifl-0/0/2/0 IPv4 16.0.1.6
1921.6800.1006.00 ifl-0/0/2/1 IPv4 16.0.2.6
1921.6800.1006.01 1000000 localExample 5: Summary view of the IS-IS SPF result of a specific instance for level-2
supervisor@rtbrick>spine1: op> show isis spf result instance default level-2
Instance: default, Level: 2
Destination Node Metric Neighbor Node Interface Nexthop Address
1921.6800.1001.00 0 local
1921.6800.1006.00 1000000 1921.6800.1006.00 ifl-0/0/2/0 IPv6 fe80::7847:eff:fec0:0
1921.6800.1006.00 ifl-0/0/2/1 IPv6 fe80::7847:e00:1c0:0
1921.6800.1006.00 ifl-0/0/2/0 IPv4 16.0.1.6
1921.6800.1006.00 ifl-0/0/2/1 IPv4 16.0.2.6
1921.6800.1006.01 1000000 localIS-IS Clear Commands
Clear commands allow to reset operational states.
IS-IS Interface
Syntax:
clear isis interface <option> …
| Option | Description |
|---|---|
statistics |
Clears the statistics of all IS-IS interfaces. |
Example: The example below shows how to clear IS-IS interface statistics.
supervisor@rtbrick>spine1: op> clear isis interface statisticsIS-IS Neighbor
Syntax:
clear isis neighbor <option> …
| Option | Description |
|---|---|
neighbor |
Clears neighbors of the default instance |
neighbor instance <instance_name> |
Clears neighbors of the specified instance |
neighbor instance <instance_name> interface <interface-name> |
Clears the specified interface of a specified neighbor instance |
Example: The example below shows how to clear neighbors of the specified instance
supervisor@rtbrick>spine1: op> clear isis neighbor instance defaultIS-IS Database
Syntax:
clear isis database <option> …
| Option | Description |
|---|---|
Instance |
Clears neighbors of the default instance |
level-1 |
Clears area level-1 |
level-2 |
Clears area level-2 |
lsp |
Clears IS-IS database for the specific LSP ID |
System |
Clears the LSDB system ID |
Example: The example below shows how to clear the database instance
supervisor@rtbrick>spine1: op> clear isis database instance defaultThe LSDB data is cleared for instance default