Resumo Protocolos de Roteamento – BSCISummary of Routing Protocols – BSCI

Olá pessoal,

Estando na fase final de preparação para a BSCI fiz um resumo mais sucinto dos protocolos de roteamento que fazem parte do escopo desta prova. Este resumo visa diferenciar diversos detalhes que são cobrados na BSCI, tais como: métrica padrão quando uma rota é redistribuida, terminologia e muitos outros aspectos. Os protocolos de roteamento cobrado no exame são:

– EIGRP

OSPF multiarea

Integrated IS-IS

BGP in a non-Transit AS.

Foi criada uma tabela no excel que foi convertida para uma figura. Esta é apresentada um pouco menor abaixo. Clique na figura para obtê-la na íntegra.

EIGRP - OSPF - ISIS - BGP. Resumo

Um abração pessoal,

Maurício.Hello everybody,

In the final stage of preparation for BSCI did a more succinct summary of the routing protocols that are part of the scope of this evidence. This summary aims to differentiate various details that are charged in BSCI, such as standard metric when a route is redistributed, terminology and much more. The routing protocols charged in the examination are:

EIGRP

– OSPF multiarea

– Integrated IS-IS

– BGP in a non-transit AS.

It created a table in Excel which was converted to a figure. This appears a little lower down. Click the picture to download it in full.

EIGRP - OSPF - ISIS - BGP. Resumo

Cheers,

Maurício.

Resumo de comandos Show para Integrated IS-IS – BSCISummary of Show commands for Integrated IS-IS – BSCI

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 IS-IS – Geral Apresenta resumo, contêm: número de interfaces que está rodando, NET address e timers.
show clns neighbors 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 IS-IS – Neighbors Apresenta detalhes dos vizinhos. Além das informações anteriores apresenta ainda: IP address, uptime e área (extraído do NET).
show clns route IS-IS – Routes Apresenta todos os NSAP (Network Service Access Point) é possível rotear dados.
show isis topology [..] 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 [..] 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 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 IS-IS – General Displays summary, include: number of interfaces that are running, NET timers and address.
show clns neighbors 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 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 IS-IS – Routes Displays all NSAP (Network Service Access Point) you can route data.
show isis topology [..] 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 [..] 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 IS-IS – SPF Presents relevant information to the application of SPF algorithm. If there are many executions of suspected problems with configuration.

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
1/0/0 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
0/0/0 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
0/0/0 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
0/0/0 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

A Abrasive,

Maurício Bento Ghem.

Laboratório OSPF e IS-IS com Redistribution bidirecionalLaboratory OSPF and IS-IS with bidirectional Redistribution

Olá Pessoal,

É com muito orgulho que vos apresento um laboratório muito interessante, seguindo o título original do Lab:

Laboratório OSPF e IS-IS com redistribution bidirecional e NSSA area com default-route, ilustrado abaixo.

Topologia - Laboratorio OSPF e ISIS com redirecionamento bidirecional

Com este lab foi possível adquirir inúmeros conhecimentos, principalmente de redistribuição de rotas entre protocolos.

Após bastante tempo tentando implementar a maneira ótima para a redistribuição, ou seja, redistribuir apenas as summary routes (foi utilizado endereçamento hierárquico), finalmente consegui e lhes disponibilizo o laboratório. Reparem que foi utilizada uma área NSSA (not-so-stubby area) do OSPF para complicar um pouco mais a situação.

Como todos os laboratórios publicados por mim, corrijam os caminhos no arquivo .net e peguem as IOS correspondentes no HD do blog, pasta IOS. Lembrem-se de que para realizar o laboratório desde o início, ou seja, configurar cada um dos dispositivos eu disponibilizo a configuração base nos arquivos TXT, sendo que a configuração final está nos arquivos .cfg, na subpasta.

Também, seguem as mesmas recomendações de aprendizado. Usem e abusem de comandos show e debug, modifiquem as configurações, derrubem os links para verificar a convergência. Utilizem este Lab para aprender.

Segue abaixo o link para download do laboratório:

Laboratorio OSPF e ISIS com Redistribution bidirecional

Qualquer dúvida, sintam-se a vontade para entrar em contato comigo.

Um abração pessoal,

Maurício Bento Ghem.Hello Guys,

It is with great pride that I present a very interesting laboratory, following the original title of the Lab:

Laboratory OSPF and IS-IS redistribution with bidirectional and NSSA area with default-route, shown below.

Topologia - Laboratorio OSPF e ISIS com redirecionamento bidirecional

With this lab was possible to acquire many skills, especially the redistribution of routes between protocols.

After some time trying to implement the optimal way for redistribution, or redistribute only the summary routes (hierarchical addressing was used), and finally it offers them the laboratory. Repair an area that was used ÑßÅ (not-so-stubby area) of OSPF to complicate the situation a little more.

Like all laboratories published by me, correct the paths in the. Net and grab the corresponding IOS in HD blog, IOS folder.Remember that to perform the laboratory from the start, or configure each device I provided the basic configuration files in TXT, and the final configuration is in the archives. Cfg in subfolder.

Also, follow the same recommendations for learning. Use and abuse of show and debug commands, modify the settings, put the links to check the convergence. Use this lab to learn.

Here is the link to download the laboratory:

Laboratory ISIS and OSPF Redistribution with bidirectional

No doubt, to feel the desire to contact me.

A Abrasive staff,

Maurício Bento Ghem.

Laboratório IS-IS Multiarea com Frame-relayLab IS-IS Multiarea with Frame-relay

Laboratorio IS-IS MultiareaOlá Pessoal,

Seguindo meus estudos para a BSCI, a primeira das quatro provas do CCNP, apresento-lhes um laboratório que fiz para entender o funcionamento do protocolo Integrated IS-IS.

Este protocolo numa primeira instância parece ser complicado, mas não há nada disso. A diferença é que ele se baseia no endereçamento OSI e não IP em suas origens. Outra vantagem é que ele roda na camada de Enlace.

O laboratório baseia-se numa configuração multi-area que utiliza três dispositivos Level 1-2 e outros três Level 1 para roteamento interno das áreas. A topologia é feita sob uma rede Frame-relay multiponto como é visto na figura.

Foi utilizada a IOS c7200-ik9o3s-mz.123-22.bin disponível do HD do blog pasta IOS.

Relembro que deve-se modificar os paths das IOS no arquivo .net incluso. Também, ressalto que a configuração na NVRAM dos routers é a completa após êxito do laboratório. Se você deseja iniciar uma nova configuração utilize os TXTs como configuração base.

Abaixo segue o link para download:

Laboratorio IS-IS Multiarea com Framerelay

Um abração pessoal,

Maurício Bento Ghem.


Laboratorio IS-IS MultiareaHello Guys,

Following my studies for the BSCI, the first of four tests of CCNP, presenting them to a lab that I understand the operation of the Integrated IS-IS protocol.

This protocol in the first instance seems to be complicated, but there is none. The difference is that it is based on OSI and not IP address in its origins. Another advantage is that it runs on the link layer.

The laboratory is based on a multi-area configuration that uses three devices and three other Level 1-2 Level 1 routing to internal areas. The topology is done in a Frame-relay multipoint network is seen as in the picture.

Was used to IOS c7200-mz.123-22.bin-ik9o3savailable in HD blog IOS folder.

Remember that you must change the paths of the IOS file. Net included. Also, it appears that the configuration in NVRAM of the router is successfully completed after the lab. If you want to start a new configuration using the configuration as TXTs base.

Below follows the link to download:

Laboratorio Multiarea IS-IS with Framerelay

A Abrasive staff,

Maurício Bento Ghem.

Resumo de Protocolos de Roteamento – EIGRP + OSPF + ISIS + BGPSummary of Routing Protocols – EIGRP + OSPF + ISIS + BGP

Olá Pessoal,

Como estou estudando para BSCI fiz um grande resumão de cada um dos protocolos de roteamento para IPv4.

Um detalhe que deve-se observar é que este resumão foi feito em inglês (:S). Acreditem pessoal, eu consigo pensar melhor em inglês atualmente, especialmente para o estudo. Como o resumo é apresentado em tópicos é interessante para todos.

Para os que estão estudando para a CCNA é interessante dar uma breve olhada para ver o que tem por aí e aproveitar alguns tópicos que são escopo da certificação.

Um abração,

Maurício.

Segue abaixo:

Big Resume

EIGRP:
– Cisco proprietary and distance vector protocol (hybrid).
– Incremental updates.
– Uses Dual and crazy metric with K-values (1,3, Bw e DLY default)
– Establishes neighbors and mainting 3 tables (neighbor, topology, routing table).
– Neighbors must match: authentication, subnet, k-values, hello and dead timers.
– Only protocol that supports unequal cost load-balancing and backup routes (Feasible sucessor).
– If FS > AD the router can be a Feasible Sucessor.
– If there isn’t a feasible sucessor the router sends queryes for its neighbors asking for the route.
– Stuck-in-Active (SIA) is when a network is so big that it searches through it. To solve, router stub or summarization.
– Support ip summary address eigrp in the interface for summarizing the networks.
– Support keychain MD5 and plaintext authentication per interface.
– Support percentage of bandwidth usage, very used in PVC links.
– If you redistribute into EIGRP and don’t set a default-metric the route don’t to go to the routing table, because metric = infinite.Hello Guys,

As I am studying for BSCI great summary of each routing protocols for IPv4.

One detail that should be noted that this was done in English resumão (: S). Believe staff, I can think better in English now, especially for the study. As the summary is presented in topics is interesting for all.

For those who are studying for the CCNA is interesting to give a brief look to see what is out there and enjoy some topics that are scope of certification.

A Abrasive,

Maurício.

Below:

Big Resume

EIGRP:
– Cisco proprietary and distance vector protocol (hybrid).
– Incremental updates.
– Uses Dual and crazy metric with K-values (1,3, Bw e DLY default)
– Establishes neighbors and mainting 3 tables (neighbor, topology, routing table).
– Neighbors must match: authentication, subnet, k-values, hello and dead timers.
– Only protocol that supports unequal cost load-balancing and backup routes (Feasible sucessor).
– If FS > AD the router can be a Feasible Sucessor.
– If there isn’t a feasible sucessor the router sends queryes for its neighbors asking for the route.
– Stuck-in-Active (SIA) is when a network is so big that it searches through it. To solve, router stub or summarization.
– Support ip summary address eigrp in the interface for summarizing the networks.
– Support keychain MD5 and plaintext authentication per interface.
– Support percentage of bandwidth usage, very used in PVC links.
– If you redistribute into EIGRP and don’t set a default-metric the route don’t to go to the routing table, because metric = infinite. Continue lendo “Resumo de Protocolos de Roteamento – EIGRP + OSPF + ISIS + BGPSummary of Routing Protocols – EIGRP + OSPF + ISIS + BGP“