7 :abbr:`ISIS (Intermediate System to Intermediate System)` is a routing protocol
8 which is described in :t:`ISO10589`, :rfc:`1195`, :rfc:`5308`. ISIS is an
9 :abbr:`IGP (Interior Gateway Protocol)`. Compared with :abbr:`RIP`,
10 :abbr:`ISIS` can provide scalable network support and faster convergence times
11 like :abbr:`OSPF`. ISIS is widely used in large networks such as :abbr:`ISP
12 (Internet Service Provider)` and carrier backbone networks.
14 .. _configuring-isisd:
19 There are no *isisd* specific options. Common options can be specified
20 (:ref:`common-invocation-options`) to *isisd*. *isisd* needs to acquire
21 interface information from *zebra* in order to function. Therefore *zebra* must
22 be running before invoking *isisd*. Also, if *zebra* is restarted then *isisd*
25 Like other daemons, *isisd* configuration is done in :abbr:`ISIS` specific
26 configuration file :file:`isisd.conf`.
33 To start ISIS process you have to specify the ISIS router. As of this
34 writing, *isisd* does not support multiple ISIS processes.
36 .. index:: router isis WORD
37 .. clicmd:: router isis WORD
39 .. index:: no router isis WORD
40 .. clicmd:: no router isis WORD
42 Enable or disable the ISIS process by specifying the ISIS domain with
43 'WORD'. *isisd* does not yet support multiple ISIS processes but you must
44 specify the name of ISIS process. The ISIS process name 'WORD' is then used
45 for interface (see command :clicmd:`ip router isis WORD`).
47 .. index:: net XX.XXXX. ... .XXX.XX
48 .. clicmd:: net XX.XXXX. ... .XXX.XX
50 .. index:: no net XX.XXXX. ... .XXX.XX
51 .. clicmd:: no net XX.XXXX. ... .XXX.XX
53 Set/Unset network entity title (NET) provided in ISO format.
55 .. index:: hostname dynamic
56 .. clicmd:: hostname dynamic
58 .. index:: no hostname dynamic
59 .. clicmd:: no hostname dynamic
61 Enable support for dynamic hostname.
63 .. index:: area-password [clear | md5] <password>
64 .. clicmd:: area-password [clear | md5] <password>
66 .. index:: domain-password [clear | md5] <password>
67 .. clicmd:: domain-password [clear | md5] <password>
69 .. index:: no area-password
70 .. clicmd:: no area-password
72 .. index:: no domain-password
73 .. clicmd:: no domain-password
75 Configure the authentication password for an area, respectively a domain, as
76 clear text or md5 one.
78 .. index:: log-adjacency-changes
79 .. clicmd:: log-adjacency-changes
81 .. index:: no log-adjacency-changes
82 .. clicmd:: no log-adjacency-changes
84 Log changes in adjacency state.
86 .. index:: metric-style [narrow | transition | wide]
87 .. clicmd:: metric-style [narrow | transition | wide]
89 .. index:: no metric-style
90 .. clicmd:: no metric-style
92 Set old-style (ISO 10589) or new-style packet formats:
95 Use old style of TLVs with narrow metric
97 Send and accept both styles of TLVs during transition
99 Use new style of TLVs to carry wider metric
101 .. index:: set-overload-bit
102 .. clicmd:: set-overload-bit
104 .. index:: no set-overload-bit
105 .. clicmd:: no set-overload-bit
107 Set overload bit to avoid any transit traffic.
109 .. index:: purge-originator
110 .. clicmd:: purge-originator
112 .. index:: no purge-originator
113 .. clicmd:: no purge-originator
115 Enable or disable :rfc:`6232` purge originator identification.
122 .. index:: lsp-gen-interval (1-120)
123 .. clicmd:: lsp-gen-interval (1-120)
125 .. index:: lsp-gen-interval [level-1 | level-2] (1-120)
126 .. clicmd:: lsp-gen-interval [level-1 | level-2] (1-120)
128 .. index:: no lsp-gen-interval
129 .. clicmd:: no lsp-gen-interval
131 .. index:: no lsp-gen-interval [level-1 | level-2]
132 .. clicmd:: no lsp-gen-interval [level-1 | level-2]
134 Set minimum interval in seconds between regenerating same LSP,
135 globally, for an area (level-1) or a domain (level-2).
137 .. index:: lsp-refresh-interval [level-1 | level-2] (1-65235)
138 .. clicmd:: lsp-refresh-interval [level-1 | level-2] (1-65235)
140 .. index:: no lsp-refresh-interval [level-1 | level-2]
141 .. clicmd:: no lsp-refresh-interval [level-1 | level-2]
143 Set LSP refresh interval in seconds, globally, for an area (level-1) or a
146 .. index:: max-lsp-lifetime (360-65535)
147 .. clicmd:: max-lsp-lifetime (360-65535)
149 .. index:: max-lsp-lifetime [level-1 | level-2] (360-65535)
150 .. clicmd:: max-lsp-lifetime [level-1 | level-2] (360-65535)
152 .. index:: no max-lsp-lifetime
153 .. clicmd:: no max-lsp-lifetime
155 .. index:: no max-lsp-lifetime [level-1 | level-2]
156 .. clicmd:: no max-lsp-lifetime [level-1 | level-2]
158 Set LSP maximum LSP lifetime in seconds, globally, for an area (level-1) or
161 .. index:: spf-interval (1-120)
162 .. clicmd:: spf-interval (1-120)
164 .. index:: spf-interval [level-1 | level-2] (1-120)
165 .. clicmd:: spf-interval [level-1 | level-2] (1-120)
167 .. index:: no spf-interval
168 .. clicmd:: no spf-interval
170 .. index:: no spf-interval [level-1 | level-2]
171 .. clicmd:: no spf-interval [level-1 | level-2]
173 Set minimum interval between consecutive SPF calculations in seconds.
180 .. index:: is-type [level-1 | level-1-2 | level-2-only]
181 .. clicmd:: is-type [level-1 | level-1-2 | level-2-only]
183 .. index:: no is-type
184 .. clicmd:: no is-type
186 Define the ISIS router behavior:
189 Act as a station router only
191 Act as both a station router and an area router
193 Act as an area router only
200 .. index:: ip router isis WORD
201 .. clicmd:: ip router isis WORD
203 .. index:: no ip router isis WORD
204 .. clicmd:: no ip router isis WORD
206 .. _ip-router-isis-word:
208 Activate ISIS adjacency on this interface. Note that the name
209 of ISIS instance must be the same as the one used to configure the ISIS process
210 (see command :clicmd:`router isis WORD`).
212 .. index:: isis circuit-type [level-1 | level-1-2 | level-2]
213 .. clicmd:: isis circuit-type [level-1 | level-1-2 | level-2]
215 .. index:: no isis circuit-type
216 .. clicmd:: no isis circuit-type
218 Configure circuit type for interface:
221 Level-1 only adjacencies are formed
223 Level-1-2 adjacencies are formed
225 Level-2 only adjacencies are formed
227 .. index:: isis csnp-interval (1-600)
228 .. clicmd:: isis csnp-interval (1-600)
230 .. index:: isis csnp-interval (1-600) [level-1 | level-2]
231 .. clicmd:: isis csnp-interval (1-600) [level-1 | level-2]
233 .. index:: no isis csnp-interval
234 .. clicmd:: no isis csnp-interval
236 .. index:: no isis csnp-interval [level-1 | level-2]
237 .. clicmd:: no isis csnp-interval [level-1 | level-2]
239 Set CSNP interval in seconds globally, for an area (level-1) or a domain
242 .. index:: isis hello padding
243 .. clicmd:: isis hello padding
245 Add padding to IS-IS hello packets.
247 .. index:: isis hello-interval (1-600)
248 .. clicmd:: isis hello-interval (1-600)
250 .. index:: isis hello-interval (1-600) [level-1 | level-2]
251 .. clicmd:: isis hello-interval (1-600) [level-1 | level-2]
253 .. index:: no isis hello-interval
254 .. clicmd:: no isis hello-interval
256 .. index:: no isis hello-interval [level-1 | level-2]
257 .. clicmd:: no isis hello-interval [level-1 | level-2]
259 Set Hello interval in seconds globally, for an area (level-1) or a domain
262 .. index:: isis hello-multiplier (2-100)
263 .. clicmd:: isis hello-multiplier (2-100)
265 .. index:: isis hello-multiplier (2-100) [level-1 | level-2]
266 .. clicmd:: isis hello-multiplier (2-100) [level-1 | level-2]
268 .. index:: no isis hello-multiplier
269 .. clicmd:: no isis hello-multiplier
271 .. index:: no isis hello-multiplier [level-1 | level-2]
272 .. clicmd:: no isis hello-multiplier [level-1 | level-2]
274 Set multiplier for Hello holding time globally, for an area (level-1) or a
277 .. index:: isis metric [(0-255) | (0-16777215)]
278 .. clicmd:: isis metric [(0-255) | (0-16777215)]
280 .. index:: isis metric [(0-255) | (0-16777215)] [level-1 | level-2]
281 .. clicmd:: isis metric [(0-255) | (0-16777215)] [level-1 | level-2]
283 .. index:: no isis metric
284 .. clicmd:: no isis metric
286 .. index:: no isis metric [level-1 | level-2]
287 .. clicmd:: no isis metric [level-1 | level-2]
289 Set default metric value globally, for an area (level-1) or a domain
290 (level-2). Max value depend if metric support narrow or wide value (see
291 command :clicmd:`metric-style [narrow | transition | wide]`).
293 .. index:: isis network point-to-point
294 .. clicmd:: isis network point-to-point
296 .. index:: no isis network point-to-point
297 .. clicmd:: no isis network point-to-point
299 Set network type to 'Point-to-Point' (broadcast by default).
301 .. index:: isis passive
302 .. clicmd:: isis passive
304 .. index:: no isis passive
305 .. clicmd:: no isis passive
307 Configure the passive mode for this interface.
309 .. index:: isis password [clear | md5] <password>
310 .. clicmd:: isis password [clear | md5] <password>
312 .. index:: no isis password
313 .. clicmd:: no isis password
315 Configure the authentication password (clear or encoded text) for the
318 .. index:: isis priority (0-127)
319 .. clicmd:: isis priority (0-127)
321 .. index:: isis priority (0-127) [level-1 | level-2]
322 .. clicmd:: isis priority (0-127) [level-1 | level-2]
324 .. index:: no isis priority
325 .. clicmd:: no isis priority
327 .. index:: no isis priority [level-1 | level-2]
328 .. clicmd:: no isis priority [level-1 | level-2]
330 Set priority for Designated Router election, globally, for the area
331 (level-1) or the domain (level-2).
333 .. index:: isis psnp-interval (1-120)
334 .. clicmd:: isis psnp-interval (1-120)
336 .. index:: isis psnp-interval (1-120) [level-1 | level-2]
337 .. clicmd:: isis psnp-interval (1-120) [level-1 | level-2]
339 .. index:: no isis psnp-interval
340 .. clicmd:: no isis psnp-interval
342 .. index:: no isis psnp-interval [level-1 | level-2]
343 .. clicmd:: no isis psnp-interval [level-1 | level-2]
345 Set PSNP interval in seconds globally, for an area (level-1) or a domain
348 .. index:: isis three-way-handshake
349 .. clicmd:: isis three-way-handshake
351 .. index:: no isis three-way-handshake
352 .. clicmd:: no isis three-way-handshake
354 Enable or disable :rfc:`5303` Three-Way Handshake for P2P adjacencies.
355 Three-Way Handshake is enabled by default.
357 .. _showing-isis-information:
359 Showing ISIS information
360 ========================
362 .. index:: show isis summary
363 .. clicmd:: show isis summary
365 Show summary information about ISIS.
367 .. index:: show isis hostname
368 .. clicmd:: show isis hostname
370 Show information about ISIS node.
372 .. index:: show isis interface
373 .. clicmd:: show isis interface
375 .. index:: show isis interface detail
376 .. clicmd:: show isis interface detail
378 .. index:: show isis interface <interface name>
379 .. clicmd:: show isis interface <interface name>
381 Show state and configuration of ISIS specified interface, or all interfaces
382 if no interface is given with or without details.
384 .. index:: show isis neighbor
385 .. clicmd:: show isis neighbor
387 .. index:: show isis neighbor <System Id>
388 .. clicmd:: show isis neighbor <System Id>
390 .. index:: show isis neighbor detail
391 .. clicmd:: show isis neighbor detail
393 Show state and information of ISIS specified neighbor, or all neighbors if
394 no system id is given with or without details.
396 .. index:: show isis database
397 .. clicmd:: show isis database
399 .. index:: show isis database [detail]
400 .. clicmd:: show isis database [detail]
402 .. index:: show isis database <LSP id> [detail]
403 .. clicmd:: show isis database <LSP id> [detail]
405 .. index:: show isis database detail <LSP id>
406 .. clicmd:: show isis database detail <LSP id>
408 Show the ISIS database globally, for a specific LSP id without or with
411 .. index:: show isis topology
412 .. clicmd:: show isis topology
414 .. index:: show isis topology [level-1|level-2]
415 .. clicmd:: show isis topology [level-1|level-2]
417 Show topology IS-IS paths to Intermediate Systems, globally, in area
418 (level-1) or domain (level-2).
420 .. index:: show ip route isis
421 .. clicmd:: show ip route isis
423 Show the ISIS routing table, as determined by the most recent SPF
426 .. _isis-traffic-engineering:
431 .. index:: mpls-te on
432 .. clicmd:: mpls-te on
434 .. index:: no mpls-te
435 .. clicmd:: no mpls-te
437 Enable Traffic Engineering LSP flooding.
439 .. index:: mpls-te router-address <A.B.C.D>
440 .. clicmd:: mpls-te router-address <A.B.C.D>
442 .. index:: no mpls-te router-address
443 .. clicmd:: no mpls-te router-address
445 Configure stable IP address for MPLS-TE.
447 .. index:: show isis mpls-te interface
448 .. clicmd:: show isis mpls-te interface
450 .. index:: show isis mpls-te interface INTERFACE
451 .. clicmd:: show isis mpls-te interface INTERFACE
453 Show MPLS Traffic Engineering parameters for all or specified interface.
455 .. index:: show isis mpls-te router
456 .. clicmd:: show isis mpls-te router
458 Show Traffic Engineering router parameters.
462 :ref:`ospf-traffic-engineering`
469 .. index:: debug isis adj-packets
470 .. clicmd:: debug isis adj-packets
472 .. index:: no debug isis adj-packets
473 .. clicmd:: no debug isis adj-packets
475 IS-IS Adjacency related packets.
477 .. index:: debug isis checksum-errors
478 .. clicmd:: debug isis checksum-errors
480 .. index:: no debug isis checksum-errors
481 .. clicmd:: no debug isis checksum-errors
483 IS-IS LSP checksum errors.
485 .. index:: debug isis events
486 .. clicmd:: debug isis events
488 .. index:: no debug isis events
489 .. clicmd:: no debug isis events
493 .. index:: debug isis local-updates
494 .. clicmd:: debug isis local-updates
496 .. index:: no debug isis local-updates
497 .. clicmd:: no debug isis local-updates
499 IS-IS local update packets.
501 .. index:: debug isis packet-dump
502 .. clicmd:: debug isis packet-dump
504 .. index:: no debug isis packet-dump
505 .. clicmd:: no debug isis packet-dump
509 .. index:: debug isis protocol-errors
510 .. clicmd:: debug isis protocol-errors
512 .. index:: no debug isis protocol-errors
513 .. clicmd:: no debug isis protocol-errors
515 IS-IS LSP protocol errors.
517 .. index:: debug isis route-events
518 .. clicmd:: debug isis route-events
520 .. index:: no debug isis route-events
521 .. clicmd:: no debug isis route-events
523 IS-IS Route related events.
525 .. index:: debug isis snp-packets
526 .. clicmd:: debug isis snp-packets
528 .. index:: no debug isis snp-packets
529 .. clicmd:: no debug isis snp-packets
531 IS-IS CSNP/PSNP packets.
533 .. index:: debug isis spf-events
534 .. clicmd:: debug isis spf-events
536 .. index:: debug isis spf-statistics
537 .. clicmd:: debug isis spf-statistics
539 .. index:: debug isis spf-triggers
540 .. clicmd:: debug isis spf-triggers
542 .. index:: no debug isis spf-events
543 .. clicmd:: no debug isis spf-events
545 .. index:: no debug isis spf-statistics
546 .. clicmd:: no debug isis spf-statistics
548 .. index:: no debug isis spf-triggers
549 .. clicmd:: no debug isis spf-triggers
551 IS-IS Shortest Path First Events, Timing and Statistic Data and triggering
554 .. index:: debug isis update-packets
555 .. clicmd:: debug isis update-packets
557 .. index:: no debug isis update-packets
558 .. clicmd:: no debug isis update-packets
560 Update related packets.
562 .. index:: show debugging isis
563 .. clicmd:: show debugging isis
565 Print which ISIS debug level is activate.
567 ISIS Configuration Examples
568 ===========================
570 A simple example, with MD5 authentication enabled:
577 isis network point-to-point
578 isis circuit-type level-2-only
581 net 47.0023.0000.0000.0000.0000.0000.0000.1900.0004.00
586 A Traffic Engineering configuration, with Inter-ASv2 support.
588 First, the :file:`zebra.conf` part:
594 log file /var/log/zebra.log
597 ip address 10.2.2.2/24
612 ip address 10.1.1.1/24
626 neighbor 10.1.1.2 as 65000
629 Then the :file:`isisd.conf` itself:
635 log file /var/log/isisd.log
646 isis net 47.0023.0000.0000.0000.0000.0000.0000.1900.0004.00
648 mpls-te router-address 10.1.1.1