Nota: Este Post faz parte do guide de Routing.
root@R2# run show isis interface
IS-IS interface database:
Interface L CirID Level 1 DR Level 2 DR L1/L2 Metric
em0.0 3 0x2 R2.00 R2.02 1000/10
em1.0 3 0x3 R2.03 R2.00 10/10
lo0.0 0 0x1 Passive Passive 0/0
Campos do output do comando show isis interface:
interface-name (detail output only) – Displays the name of the interface;
Index (detail output only) – Displays the interface index assigned by the junOS OS kernel;
State (detail output only) – Displays the internal implementation information;
Circuit ID (detail output only) – Displays the circuit identifier;
Circuit type (detail output only) – Displays the circuit type, which can be 1 —Level 1 only, 2 —Level 2 only, or 3 — Level 1 and Level 2;
LSP interval (detail output only) – Displays the interface’s link-state PDU interval;
Sysid (detail output only) – Displays the system identifier;
Interface (brief output only) – Displays the interface through which the adjacency is made.
Level 1 DR/Level 2 DR (brief output only) – Displays the Level 1 or Level 2 DIS;
L1/L2 Metric: Displays the interface’s metric for Level 1 and Level 2. If no information is present, the metric is 0;
Adjacencies (detail output only) – Displays the number of adjacencies established on the interface;
Priority (detail output only) – Displays the priority value for this interface;
Metric (detail output only) – Displays the metric value for this interface;
Hello(s) (detail output only) – Displays the interface’s hello interval; and
Hold(s) (detail output only) – Displays the interface’s hold time.
root@R2# run show isis database
IS-IS level 1 link-state database:
LSP ID Sequence Checksum Lifetime Attributes
R1.00-00 0x1d 0xc00e 737 L1
R2.00-00 0x1a 0x1c02 341 L1 L2 Attached
R2.03-00 0x13 0x225d 341 L1 L2
3 LSPs
IS-IS level 2 link-state database:
LSP ID Sequence Checksum Lifetime Attributes
R1.00-00 0x5 0xa4c4 699 L1 L2
R2.00-00 0x21 0x6045 761 L1 L2
R2.02-00 0x16 0x4b30 341 L1 L2
R2.03-00 0x3 0 0 L1 L2
R3.00-00 0x1b 0x5e41 1013 L1 L2
5 LSPs
Campos do output do comando show isis database:
LSP ID – Displays the link-state PDU identifier;
Sequence – Displays the sequence number of the link-state PDU;
Checksum – Displays the checksum value of the link-state PDU;
Lifetime (secs) – Displays the remaining lifetime of the link-state PDU, in seconds;
IP prefix (detail and extensive output only) – Displays the prefix advertised by the link-state PDU;
IS neighbor (detail output only) – Displays an IS-IS neighbor of the advertising system; and
Metric (detail and extensive output only) – Displays the metric of the prefix or neighbor.
root@R2# run show isis adjacency
Interface System L State Hold (secs) SNPA
em0.0 R3 2 Up 23 0:ab:44:8:f8:0
em1.0 R1 1 Up 25 0:ab:ae:99:e3:0
Interface – Displays the interface through wh ich the neighbor is reachable.
System (brief output only) – Displays the system identifier, printed as a name if possible.
L – Displays the level, which can be 1 —Level 1 only; 2 —Level 2 only;
or 3 —Level 1 and Level 2. An exclamation point ( ! ) preceding the level number indicates that the adjacency is missing an IP address.
State – Displays the state of the adjacency. It can be Up, Down, New , One-way, Initializing, or Rejected .
Hold (secs) (brief/standard output only) – Displays the remaining hold time of the adjacency. Note that the show isis adjacency command returns brief output by default.
SNPA (brief output only) – Displays the SNPA (MAC address of the next hop).
root@R2# run show isis adjacency detail
R3
Interface: em0.0, Level: 2, State: Up, Expires in 24 secs
Priority: 64, Up/Down transitions: 1, Last transition: 00:14:29 ago
Circuit type: 3, Speaks: IP, IPv6, MAC address: 0:ab:44:8:f8:0
Topologies: Unicast
Restart capable: Yes, Adjacency advertisement: Advertise
LAN id: R2.02, IP addresses: 10.1.23.3
R1
Interface: em1.0, Level: 1, State: Up, Expires in 26 secs
Priority: 64, Up/Down transitions: 3, Last transition: 03:04:35 ago
Circuit type: 3, Speaks: IP, IPv6, MAC address: 0:ab:ae:99:e3:0
Topologies: Unicast
Restart capable: Yes, Adjacency advertisement: Advertise
LAN id: R2.03, IP addresses: 10.1.12.1
Campos do output do comando show isis adjacency detail:
Expires in (detail output only): Displays the time until the adjacency expires, in seconds;
Priority (detail output only): Displays the priority to become the DIS;
Up/Down transitions (detail output only): Displays the count of adjacency status changes from up to down or from down to up;
Last transition (detail output only): Displays the time of the last up or down transition;
Circuit type (detail output only): Displays the bit mask of levels on this interface, which can be 1 —Level 1 router, 2 —Level 2 router, or 1/2 —both Level 1 and Level 2 routers;
Speaks (detail output only): Displays the protocols supported by the neighbor; and
IP addresses (detail output only): Displays the IP address of the neighbor.
root@R2# run show isis spf log
IS-IS level 1 SPF log:
Start time Elapsed (secs) Count Reason
Fri Jul 25 19:01:08 0.000200 3 Lost adjacency R3 on em0.0
Fri Jul 25 19:01:16 0.000189 2 Multi area attachment change
Fri Jul 25 19:15:55 0.000791 1 Periodic SPF
Fri Jul 25 19:19:08 0.000194 1 Updated LSP R3.00-00
Fri Jul 25 19:33:52 0.000201 1 Periodic SPF
Fri Jul 25 19:46:27 0.000353 1 Periodic SPF
Fri Jul 25 19:58:41 0.000201 1 Periodic SPF
Fri Jul 25 20:12:13 0.000216 1 Periodic SPF
Fri Jul 25 20:24:59 0.000187 1 Periodic SPF
Fri Jul 25 20:36:44 0.000276 1 Periodic SPF
Fri Jul 25 20:49:43 0.000207 1 Periodic SPF
Fri Jul 25 21:03:50 0.000207 1 Periodic SPF
Fri Jul 25 21:15:21 0.000252 1 Periodic SPF
Fri Jul 25 21:25:16 0.000215 1 Updated LSP R1.00-00
Fri Jul 25 21:25:26 0.000209 1 Updated LSP R1.00-00
Fri Jul 25 21:25:30 0.000123 1 Updated LSP R1.00-00
Fri Jul 25 21:25:41 0.000222 1 Updated LSP R1.00-00
Fri Jul 25 21:31:15 0.000191 3 Multi area attachment change
Fri Jul 25 21:32:21 0.000180 3 Multi area attachment change
Fri Jul 25 21:38:59 0.000193 1 Updated LSP R1.00-00
IS-IS level 2 SPF log:
Start time Elapsed (secs) Count Reason
Fri Jul 25 18:55:55 0.000060 1 Updated LSP R2.00-00
Fri Jul 25 19:01:08 0.000126 7 Lost adjacency R3 on em0.0
Fri Jul 25 19:01:09 0.000174 2 Updated LSP R2.00-00
Fri Jul 25 19:01:16 0.000388 1 Updated LSP R3.00-00
Fri Jul 25 19:13:30 0.000202 1 Periodic SPF
Fri Jul 25 19:26:28 0.000536 1 Periodic SPF
Fri Jul 25 19:38:54 0.000185 1 Periodic SPF
Fri Jul 25 19:52:54 0.000195 1 Periodic SPF
Fri Jul 25 20:07:49 0.000206 1 Periodic SPF
Fri Jul 25 20:19:58 0.000199 1 Periodic SPF
Fri Jul 25 20:34:46 0.000226 1 Periodic SPF
Fri Jul 25 20:46:44 0.000184 1 Periodic SPF
Fri Jul 25 21:00:02 0.000180 1 Periodic SPF
Fri Jul 25 21:14:24 0.000211 1 Periodic SPF
Fri Jul 25 21:25:16 0.000101 6 Topologies changed for adjacency R1 on em1.0
Fri Jul 25 21:25:30 0.000090 2 Purging LSP R1.00-00
Fri Jul 25 21:25:36 0.000063 1 Updated LSP R1.00-00
Fri Jul 25 21:31:15 0.000301 3 Lost adjacency R3 on em0.0
Fri Jul 25 21:32:21 0.000266 5 Topologies changed for adjacency R3 on em0.0
Fri Jul 25 21:39:21 0.000218 3 Lost adjacency R1 on em1.0
Campos do output do comando show isis spf log:
Node: Displays the system ID of a node;
Metric : Displays the metric to the node;
Interface: Displays the interface of the next hop;
Via : Displays the system ID of the next hop;
SNPA: Displays the SNPA (MAC address of the next hop);
Start time (log output only): Displays the time that the SPF computation started;
Elapsed time (log output only): Displays the length of time required to complete the SPF computation in seconds;
Count (log output only): Displays the number of times the SPF was triggered; and
Reason (log output only): Displays the reason that the SPF computation was completed.
root@R2# run show isis statistics
IS-IS statistics for R2:
PDU type Received Processed Drops Sent Rexmit
LSP 75 75 0 186 0
IIH 5404 54 1567 12380 0
CSNP 0 0 0 2784 0
PSNP 7 7 0 0 0
Unknown 0 0 0 0 0
Totals 5486 136 1567 15350 0
Total packets received: 5486 Sent: 15350
SNP queue length: 0 Drops: 0
LSP queue length: 0 Drops: 0
SPF runs: 76
Fragments rebuilt: 112
LSP regenerations: 50
Purges initiated: 7
Campos do output do comando show isis statistics:
PDU type : Displays the PDU type.
Received : Displays the number of PDUs received since IS-IS started or since the statistics were zeroed.
Processed: Displays the number of PDUs received minus the number dropped.
Drops: Displays the number of dropped PDUs.
Sent: Displays the number of PDUs transmitted since IS-IS started or since the statistics were zeroed.
Rexmit : Displays the number of PDUs retransmitted since IS-IS started or since the statistics were zeroed.
Total packets received/sent: Displays the total number of PDUs received and transmitted since IS-IS started or since the statistics were zeroed.
SNP queue length : Displays the number of CSNPs and PSNPs sitting on the sequence number packets (SNP) queue waiting for processing. This value is almost always 0.
LSP queue length : Displays the number of link-state PDUs sitting on the link-state PDU queue waiting for processing. This value is almost always 0.
SPF runs : Displays the number of SPF calculations performed. If this number is incrementing rapidly, it indicates that the network is unstable.
Fragments rebuilt: Displays the number of link-state PDU fragments that the local system has computed.
LSP regenerations: Displays the number of link-state PDUs that were regenerated. A link-state PDU is regenerated when it is nearing the end of its lifetime and it has not changed.
Purges initiated: Displays the number of purges that the system initiated. A purge is initiated if the software decides that a link-state PDU must be removed from the network.
root@R2# run show isis route
IS-IS routing table Current version: L1: 36 L2: 40
IPv4/IPv6 Routes
—————-
Prefix L Version Metric Type Interface NH Via
10.10.10.1/32 1 36 10 int em1.0 IPV4 R1
10.10.10.3/32 2 40 10 int em0.0 IPV4 R3
Campos do output do comando show isis route:
Current version: Displays the number of the current version of the IS-IS routing table.
L1: Displays the version of the Level 1 SPF that was run.
L2: Displays the version of the Level 2 SPF that was run.
Prefix : Displays the destination of the route.
L : Displays the level, which can be 1 —Level 1 only; 2 —Level 2 only; and 3 —Level 1 and Level 2.
Version: Displays the version (or run) of SPF that generated the route.
Metric : Displays the metric value associated with the route.
Type: Displays the metric type. It can be int (internal) or ext (external).
Interface: Displays the interface to the next hop.
Via : Displays the system ID of the next hop, displayed as a name if possible.
root@R2# run show isis database extensive
IS-IS level 1 link-state database:
R1.00-00 Sequence: 0x1d, Checksum: 0xc00e, Lifetime: 700 secs
IS neighbor: R2.03 Metric: 10
Two-way fragment: R2.03-00, Two-way first fragment: R2.03-00
IP prefix: 10.1.12.0/24 Metric: 10 Internal Up
IP prefix: 10.10.10.1/32 Metric: 0 Internal Up
Header: LSP ID: R1.00-00, Length: 141 bytes
Allocated length: 284 bytes, Router ID: 10.10.10.1
Remaining lifetime: 700 secs, Level: 1, Interface: 66
Estimated free bytes: 164, Actual free bytes: 143
Aging timer expires in: 700 secs
Protocols: IP, IPv6
Packet: LSP ID: R1.00-00, Length: 141 bytes, Lifetime : 1198 secs
Checksum: 0xc00e, Sequence: 0x1d, Attributes: 0x1 <L1>
NLPID: 0x83, Fixed length: 27 bytes, Version: 1, Sysid length: 0 bytes
Packet type: 18, Packet version: 1, Max area: 0
TLVs:
Area address: 49.0001 (3)
Speaks: IP
Speaks: IPV6
IP router id: 10.10.10.1
IP address: 10.10.10.1
Hostname: R1
IS neighbor: R2.03, Internal, Metric: default 10
IS extended neighbor: R2.03, Metric: default 10
IP address: 10.1.12.1
Local interface index: 64, Remote interface index: 0
IP prefix: 10.1.12.0/24, Internal, Metric: default 10, Up
IP prefix: 10.10.10.1/32, Internal, Metric: default 0, Up
IP extended prefix: 10.1.12.0/24 metric 10 up
IP extended prefix: 10.10.10.1/32 metric 0 up
No queued transmissions
Campos do output do comando show isis database extensive:
LSP ID : Displays the link-state PDU identifier;
Sequence : Displays the sequence number of the link-state PDU;
Checksum : Displays the checksum value of the link-state PDU;
Lifetime (in seconds): Displays the remaining lifetime of the link-state PDU, in seconds;
IP prefix (detail and extensive output only): Displays the prefix advertised by this link-state PDU;
IS neighbor (detail output only): Displays an IS-IS neighbor of the advertising system; and
Metric (detail and extensive output only): Displays the metric of the prefix or neighbor.
IP Configuration is Not necessary
O IS-IS permite formar adjacencias entre neighbors que não estejam configurados com a mesma subnet, isto porque não se baseia no IP.
Troubleshooting No adjacency
Mismatched Areas
MTU minimo 1492
Sem NET configurado
Referências:
Notas estudo JNCIS-ENT parte 1
Notas estudo JNCIS-ENT parte 2
Notas estudo JNCIS-ENT parte 3
Notas estudo JNCIS-ENT parte 4
Notas estudo JNCIS-ENT parte 5
Notas estudo JNCIS-ENT parte 6
Notas estudo JNCIS-ENT parte 7
Notas estudo JNCIS-ENT parte 8
Notas estudo JNCIS-ENT parte 9
Notas estudo JNCIS-ENT parte 10
Notas estudo JNCIS-ENT parte 11
Notas estudo JNCIS-ENT parte 12
Notas estudo JNCIS-ENT parte 13
Notas estudo JNCIS-ENT parte 14
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