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| -rw-r--r-- | docs/configuration/protocols/isis.rst | 239 |
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diff --git a/docs/configuration/protocols/isis.rst b/docs/configuration/protocols/isis.rst index 753637f9..71ddc856 100644 --- a/docs/configuration/protocols/isis.rst +++ b/docs/configuration/protocols/isis.rst @@ -7,12 +7,13 @@ IS-IS ##### :abbr:`IS-IS (Intermediate System to Intermediate System)` is a link-state -interior gateway routing protocol. Like OSPF, IS-IS runs the Dijkstra -shortest-path first (SPF) algorithm to create a database of the network’s -topology and, from that database, to determine the best (that is, shortest) -path to a destination. The routers exchange topology information with their -nearest neighbors. IS-IS runs directly on the data link layer (Layer 2). -IS-IS addresses are called :abbr:`NETs (Network Entity Titles)` and can be +interior gateway routing protocol which is described in ISO10589, +:rfc:`1195`, :rfc:`5308`. Like OSPF, IS-IS runs the Dijkstra shortest-path +first (SPF) algorithm to create a database of the network’s topology and, +from that database, to determine the best (that is, shortest) path to a +destination. The routers exchange topology information with their nearest +neighbors. IS-IS runs directly on the data link layer (Layer 2). IS-IS +addresses are called :abbr:`NETs (Network Entity Titles)` and can be 8 to 20 bytes long, but are generally 10 bytes long. For example :abbr:`NET (Network Entity Title)` @@ -36,6 +37,232 @@ The IS-IS address consists of three parts: NET selector: ``00`` Must always be 00, to indicate "this system". + +General Configuration +--------------------- + +.. cfgcmd:: set protocols isis <name> net <network-entity-title> + + This command enables the ISIS process by specifying the ISIS domain with + ‘name’. ISIS implementation does not yet support multiple ISIS processes + but you must specify the name of ISIS process. This commad also sets + network entity title (NET) provided in ISO format. + +.. cfgcmd:: set protocols isis <name> interface <interface> + + This command activates ISIS adjacency on this interface. Note that the name + of ISIS instance must be the same as the one used to configure the ISIS + process. + +.. cfgcmd:: set protocols isis <name> dynamic-hostname + + This command enables support for dynamic hostname. Dynamic hostname mapping + determined as described in :rfc:`2763`, Dynamic Hostname Exchange Mechanism + for IS-IS. + +.. cfgcmd:: set protocols isis <name> level <level-1|level-1-2|level-2> + + This command defines the ISIS router behavior: + + **level-1** Act as a station router only. + **level-1-2** Act as both a station router and an area router. + **level-2-only** Act as an area router only. + +.. cfgcmd:: set protocols isis <name> lsp-mtu <size> + + This command configures the maximum size of generated LSPs, in bytes. The + size range is 128 to 4352. + +.. cfgcmd:: set protocols isis <name> metric-style <narrow|transition|wide> + + This command sets old-style (ISO 10589) or new-style packet formats: + + **narrow** Use old style of TLVs with narrow metric. + **transition** Send and accept both styles of TLVs during transition. + **wide** Use new style of TLVs to carry wider metric. + +.. cfgcmd:: set protocols isis <name> purge-originator + + This command enables :rfc:`6232` purge originator identification. Enable + purge originator identification (POI) by adding the type, length and value + (TLV) with the Intermediate System (IS) identification to the LSPs that do + not contain POI information. If an IS generates a purge, VyOS adds this TLV + with the system ID of the IS to the purge. + +.. cfgcmd:: set protocols isis <name> set-attached-bit + + This command sets ATT bit to 1 in Level1 LSPs. It is described in :rfc:`3787`. + +.. cfgcmd:: set protocols isis <name> set-overload-bit + + This command sets overload bit to avoid any transit traffic through this + router. It is described in :rfc:`3787`. + +.. cfgcmd:: set protocols isis name default-information originate <ipv4|ipv6> + level-1 + + This command will generate a default-route in L1 database. + +.. cfgcmd:: set protocols isis name default-information originate <ipv4|ipv6> + level-2 + + This command will generate a default-route in L2 database. + + +Interfaces Configuration +------------------------ + +.. cfgcmd:: set protocols isis <name> interface <interface> circuit-type + <level-1|level-1-2|level-2-only> + + This command specifies circuit type for interface: + + **level-1** Level-1 only adjacencies are formed. + **level-1-2** Level-1-2 adjacencies are formed + **level-2-only** Level-2 only adjacencies are formed + +.. cfgcmd:: set protocols isis <name> interface <interface> hello-interval + <seconds> + + This command sets hello interval in seconds on a given interface. + The range is 1 to 600. + +.. cfgcmd:: set protocols isis <name> interface <interface> hello-multiplier + <seconds> + + This command sets multiplier for hello holding time on a given + interface. The range is 2 to 100. + +.. cfgcmd:: set protocols isis <name> interface <interface> hello-padding + + This command configures padding on hello packets to accommodate asymmetrical + maximum transfer units (MTUs) from different hosts as described in + :rfc:`3719`. This helps to prevent a premature adjacency Up state when one + routing device’s MTU does not meet the requirements to establish the + adjacency. + +.. cfgcmd:: set protocols isis <name> interface <interface> metric <metric> + + This command set default metric for circuit. The metric range is 1 to + 16777215 (Max value depend if metric support narrow or wide value). + +.. cfgcmd:: set protocols isis <name> interface <interface> network + point-to-point + + This command specifies network type to ‘Point-to-Point’. The default network + type is broadcast. + +.. cfgcmd:: set protocols isis <name> interface <interface> passive + + This command configures the passive mode for this interface. + +.. cfgcmd:: set protocols isis <name> interface <interface> password + plaintext-password <text> + + This command configures the authentication password for the interface. + +.. cfgcmd:: set protocols isis <name> interface <interface> priority <number> + + This command sets priority for the interface for + :abbr:`DIS (Designated Intermediate System)` election. The priority + range is 0 to 127. + +.. cfgcmd:: set protocols isis <name> interface <interface> psnp-interval + <number> + + This command sets PSNP interval in seconds. The interval range is 0 + to 127. + +.. cfgcmd:: set protocols isis <name> interface <interface> + three-way-handshake + + This command enables :rfc:`5303` Three-Way Handshake for P2P adjacencies. + Three-Way Handshake is enabled by default. + + +Redistribution Configuration +---------------------------- + +.. cfgcmd:: set protocols isis <name> redistribute ipv4 <route source> level-1 + + This command redistributes routing information from the given route source + into the ISIS database as Level-1. There are six modes available for route + source: bgp, connected, kernel, ospf, rip, static. + +.. cfgcmd:: set protocols isis <name> redistribute ipv4 <route source> level-2 + + This command redistributes routing information from the given route source + into the ISIS database as Level-2. There are six modes available for route + source: bgp, connected, kernel, ospf, rip, static. + +.. cfgcmd:: set protocols isis <name> redistribute ipv4 <route source> + <level-1|level-2> metric <number> + + This command specifies metric for redistributed routes from the given route + source. There are six modes available for route source: bgp, connected, + kernel, ospf, rip, static. The metric range is 1 to 16777215. + +.. cfgcmd:: set protocols isis <name> redistribute ipv4 <route source> + <level-1|level-2> route-map <name> + + This command allows to use route map to filter redistributed routes from + the given route source. There are six modes available for route source: + bgp, connected, kernel, ospf, rip, static. + + +Timers Configuration +-------------------- + +.. cfgcmd:: set protocols isis <name> lsp-gen-interval <seconds> + + This command sets minimum interval in seconds between regenerating same + LSP. The interval range is 1 to 120. + +.. cfgcmd:: set protocols isis <name> lsp-refresh-interval <seconds> + + This command sets LSP refresh interval in seconds. IS-IS generates LSPs + when the state of a link changes. However, to ensure that routing + databases on all routers remain converged, LSPs in stable networks are + generated on a regular basis even though there has been no change to + the state of the links. The interval range is 1 to 65235. The default + value is 900 seconds. + +.. cfgcmd:: set protocols isis <name> max-lsp-lifetime <seconds> + + This command sets LSP maximum LSP lifetime in seconds. The interval range + is 350 to 65535. LSPs remain in a database for 1200 seconds by default. + If they are not refreshed by that time, they are deleted. You can change + the LSP refresh interval or the LSP lifetime. The LSP refresh interval + should be less than the LSP lifetime or else LSPs will time out before + they are refreshed. + +.. cfgcmd:: set protocols isis <name> spf-interval <seconds> + + This command sets minimum interval between consecutive SPF calculations in + seconds.The interval range is 1 to 120. + +.. cfgcmd:: set protocols isis <name> spf-delay-ietf holddown <milliseconds> + +.. cfgcmd:: set protocols isis <name> spf-delay-ietf init-delay + <milliseconds> + +.. cfgcmd:: set protocols isis <name> spf-delay-ietf long-delay + <milliseconds> + +.. cfgcmd:: set protocols isis <name> spf-delay-ietf short-delay + <milliseconds> + +.. cfgcmd:: set protocols isis <name> spf-delay-ietf time-to-learn + <milliseconds> + + This commands specifies the Finite State Machine (FSM) intended to + control the timing of the execution of SPF calculations in response + to IGP events. The process described in :rfc:`8405`. + + +Configuration Example +--------------------- + Simple IS-IS configuration using 2 nodes and redistributing connected interfaces. |