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RIP: Triggered RIP (demand circuit) documentation

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Ondrej Zajicek (work) 2020-05-18 22:16:37 +02:00
parent ec430a7fee
commit b729e731f9
2 changed files with 18 additions and 5 deletions
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14
doc/bird.sgml
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@ -4443,7 +4443,8 @@ you can't use RIP on networks where maximal distance is higher than 15
hosts.
<p>BIRD supports RIPv1 (<rfc id="1058">), RIPv2 (<rfc id="2453">), RIPng (<rfc
id="2080">), and RIP cryptographic authentication (<rfc id="4822">).
id="2080">), Triggered RIP for demand circuits (<rfc id="2091">), and RIP
cryptographic authentication (<rfc id="4822">).
<p>RIP is a very simple protocol, and it has a lot of shortcomings. Slow
convergence, big network load and inability to handle larger networks makes it
@ -4473,6 +4474,7 @@ protocol rip [ng] [&lt;name&gt;] {
version 1|2;
split horizon &lt;switch&gt;;
poison reverse &lt;switch&gt;;
demand circuit &lt;switch&gt;;
check zero &lt;switch&gt;;
update time &lt;number&gt;;
timeout time &lt;number&gt;;
@ -4577,6 +4579,16 @@ protocol rip [ng] [&lt;name&gt;] {
used. The poisoned reverse has some advantages in faster convergence,
but uses more network traffic. Default: yes.
<tag><label id="rip-iface-demand-circuit">demand circuit <m/switch/</tag>
Regular RIP sends periodic full updates on an interface. There is the
Triggered RIP extension for demand circuits (<rfc id="2091">), which
removes periodic updates and introduces update acknowledgments. When
enabled, there is no RIP communication in steady-state network. Note
that in order to work, it must be enabled on both sides. As there are
no hello packets, it depends on hardware link state to detect neighbor
failures. Also, it is designed for PtP links and it does not work
properly with multiple RIP neighbors on an interface. Default: no.
<tag><label id="rip-iface-check-zero">check zero <m/switch/</tag>
Received RIPv1 packets with non-zero values in reserved fields should
be discarded. This option specifies whether the check is performed or

9
proto/rip/rip.c
View file

@ -69,10 +69,11 @@
* structure is finally freed.
*
* Supported standards:
* - RFC 1058 - RIPv1
* - RFC 2453 - RIPv2
* - RFC 2080 - RIPng
* - RFC 4822 - RIP cryptographic authentication
* RFC 1058 - RIPv1
* RFC 2453 - RIPv2
* RFC 2080 - RIPng
* RFC 2091 - Triggered RIP for demand circuits
* RFC 4822 - RIP cryptographic authentication
*/
#include <stdlib.h>