Cisco CCNA || Guia de Estudo » Resumo de comandos Show para Integrated IS-IS – BSCISummary of Show commands for Integrated IS-IS

Olá Pessoal,

Prosseguindo a série de Comandos Show, apresento-lhes para o protocolo IS-IS.

Este protocolo é bastante diferente da maioria, pois se baseia no endereçamento OSI. Numa primeira análise parece ser complicado, mas entendendo a teoria por trás do protocolo fica tudo descomplicado.

Segue abaixo.

COMANDO	RELACIONADO A	RESULTADO
show clns ^[1]	IS-IS – Geral	Apresenta resumo, contêm: número de interfaces que está rodando, NET address e timers.
show clns neighbors ^[2]	IS-IS – Neighbors	Resumo dos vizinhos. Contêm: ID do router remoto, interface, SNPA (endereço da camada de enlace), estado, holdtime e tipo de adjacência (Level-1, Level-2).
show clns neighbors detail ^[3]	IS-IS – Neighbors	Apresenta detalhes dos vizinhos. Além das informações anteriores apresenta ainda: IP address, uptime e área (extraído do NET).
show clns route ^[4]	IS-IS – Routes	Apresenta todos os NSAP (Network Service Access Point) é possível rotear dados.
show isis topology [..] ^[5]	IS-IS – Routes	Apresenta uma lista de caminhos para todos os routers dentro do domínio de roteamento. Pode-se passar parâmetros para filtrar (apenas Level-1, por exemplo.)
show isis database [..] ^[6]	IS-IS – LSPs	Apresenta cada uma das LSPs na base de dados. Contêm informações como: router que gerou a LSP (LSPID), sequence numbers, checksum, holdtime e bits para controle. Pode-se passar parâmetros para filtrar (apenas Level-1, por exemplo.)
show isis spf-log ^[7]	IS-IS – SPF	Apresenta informações pertinentes a execução do algoritmo SPF. Se houverem muitas execuções suspeite de problemas de configuração.

OUTPUTS:

R4#show clns Global CLNS Information: 3 Interfaces Enabled for CLNS NET: 49.0020.0000.0000.000b.00 Configuration Timer: 60, Default Holding Timer: 300, Packet Lifetime 64 ERPDU's requested on locally generated packets Running IS-IS in IP-only mode (CLNS forwarding not allowed)

R4#show clns neighbors

System Id Interface SNPA State Holdtime Type Protocol R3 Se1/0 *HDLC* Up 28 L2 IS-IS R5 Se1/1 *HDLC* Up 25 L2 IS-IS

R4#show clns neighbors detail

System Id Interface SNPA State Holdtime Type Protocol R3 Se1/0 *HDLC* Up 25 L2 IS-IS Area Address(es): 49.0020 IP Address(es): 10.100.0.1* Uptime: 00:42:23 NSF capable R5 Se1/1 *HDLC* Up 23 L2 IS-IS Area Address(es): 49.0030 IP Address(es): 10.100.0.6* Uptime: 00:42:23 NSF capable

R4#show clns route Codes: C - connected, S - static, d - DecnetIV I - ISO-IGRP, i - IS-IS, e - ES-IS B - BGP, b - eBGP-neighbor

C 49.0020.0000.0000.000b.00 [1/0], Local IS-IS NET C 49.0020 [2/0], Local IS-IS Area

R3#show isis topology ? WORD Hostname or NSAP of a router l1 Paths to all level-1 routers in the area l2 Paths to all level-2 routers in the domain level-1 Paths to all level-1 routers in the area level-2 Paths to all level-2 routers in the domain | Output modifiers

R3#show isis topology

IS-IS paths to level-1 routers System Id Metric Next-Hop Interface SNPA R3 --
IS-IS paths to level-2 routers System Id Metric Next-Hop Interface SNPA R3 -- R4 5 R4 Se2/0 *HDLC* R5 15 R4 Se2/0 *HDLC*

R3#show isis database ? WORD LSPID in the form of xxxx.xxxx.xxxx.xx-xx or name.xx-xx detail Detailed link state database information l1 IS-IS Level-1 routing link state database l2 IS-IS Level-2 routing link state database level-1 IS-IS Level-1 routing link state database level-2 IS-IS Level-2 routing link state database verbose Verbose database information | Output modifiers

R3#show isis database

IS-IS Level-1 Link State Database: LSPID LSP Seq Num LSP Checksum LSP Holdtime ATT/P/OL R3.00-00 * 0x00000005 0xB7E2 1057 1/0/0 IS-IS Level-2 Link State Database: LSPID LSP Seq Num LSP Checksum LSP Holdtime ATT/P/OL R3.00-00 * 0x00000006 0x4207 1005 0/0/0 R4.00-00 0x00000005 0x9CAF 942 0/0/0 R5.00-00 0x00000005 0x63ED 795 0/0/0

R3#show isis spf-log

level 1 SPF log When Duration Nodes Count First trigger LSP Triggers 00:43:43 0 1 4 R3.00-00 PERIODIC RTCLEARED NEWMETRI C NEWLSP 00:43:27 0 1 2 R3.00-00 ATTACHFLAG LSPHEADER 00:28:52 0 1 1 PERIODIC 00:13:52 0 1 1 PERIODIC

level 2 SPF log When Duration Nodes Count First trigger LSP Triggers 00:43:44 0 1 4 R3.00-00 PERIODIC RTCLEARED NEWMETRI C NEWLSP 00:43:34 8 3 4 R3.00-00 NEWADJ LSPHEADER TLVCONTENT 00:28:54 4 3 1 PERIODIC 00:13:53 4 3 1 PERIODIC

Um abração,

Maurício Bento Ghem.Hello Guys,

Continuing the series of commands Show, presenting them to the IS-IS protocol.

This protocol is quite different from most because it is based on the OSI address. At first sight appears to be complicated, but understanding the theory behind the protocol is all uncomplicated.

Below.

COMMAND	A RELATED	RESULT
show clns ^[1]	IS-IS – General	Displays summary, include: number of interfaces that are running, NET timers and address.
show clns neighbors ^[2]	IS-IS – Neighbors	Overview of neighbors. Include: remote router ID, interface, SNPA (link-layer address), status, and type of adjacency holdtime (Level-1, Level-2).
show clns neighbors detail ^[3]	IS-IS – Neighbors	Presents details of the neighbors. Besides the above information still shows: IP address, uptime and area (from the NET).
show clns route ^[4]	IS-IS – Routes	Displays all NSAP (Network Service Access Point) you can route data.
show isis topology [..] ^[5]	IS-IS – Routes	Displays a list of paths to all routers within the area of routing. You can pass parameters to filter (only Level-1, for example.)
show isis database [..] ^[6]	IS-IS – LSPs	Displays each of the LSPs in the database. Contain information such as router that generated the LSP (LSPID), sequence numbers, checksum, holdtime and bits for control. You can pass parameters to filter (only Level-1, for example.)
show isis spf-log ^[7]	IS-IS – SPF	Presents relevant information to the application of SPF algorithm. If there are many executions of suspected problems with configuration.