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diff --git a/docs/configuration/protocols/md-bfd.md b/docs/configuration/protocols/md-bfd.md deleted file mode 100644 index 59541abc..00000000 --- a/docs/configuration/protocols/md-bfd.md +++ /dev/null @@ -1,205 +0,0 @@ ---- -lastproofread: '2023-01-27' ---- - -```{include} /_include/need_improvement.txt -``` - -(routing-bfd)= - -# BFD - -{abbr}`BFD (Bidirectional Forwarding Detection)` is described and extended by -the following RFCs: {rfc}`5880`, {rfc}`5881` and {rfc}`5883`. - -In the age of very fast networks, a second of unreachability may equal millions of lost packets. -The idea behind BFD is to detect very quickly when a peer is down and take action extremely fast. - -BFD sends lots of small UDP packets very quickly to ensures that the peer is still alive. - -This allows avoiding the timers defined in BGP and OSPF protocol to expires. - -## Configure BFD - -```{cfgcmd} set protocols bfd peer \<address\> - -Set BFD peer IPv4 address or IPv6 address -``` - -```{cfgcmd} set protocols bfd peer \<address\> echo-mode - -Enables the echo transmission mode -``` - -```{cfgcmd} set protocols bfd peer \<address\> multihop - -Allow this BFD peer to not be directly connected -``` - -```{cfgcmd} set protocols bfd peer \<address\> source [address \<address\> | interface \<interface\>] - -Bind listener to specific interface/address, mandatory for IPv6 -``` - -```{cfgcmd} set protocols bfd peer \<address\> interval echo-interval \<10-60000\> - -The minimal echo receive transmission interval that this system is -capable of handling -``` - -```{cfgcmd} set protocols bfd peer \<address\> interval multiplier \<2-255\> - -Remote transmission interval will be multiplied by this value -``` - -```{cfgcmd} set protocols bfd peer \<address\> interval [receive | transmit] \<10-60000\> - -Interval in milliseconds -``` - -```{cfgcmd} set protocols bfd peer \<address\> shutdown - -Disable a BFD peer -``` - -```{cfgcmd} set protocols bfd peer \<address\> minimum-ttl \<1-254\> - -For multi hop sessions only. Configure the minimum expected TTL for an -incoming BFD control packet. - -This feature serves the purpose of thightening the packet validation -requirements to avoid receiving BFD control packets from other sessions. -``` - -### Enable BFD in BGP - -```{cfgcmd} set protocols bgp neighbor \<neighbor\> bfd - -Enable BFD on a single BGP neighbor -``` - -```{cfgcmd} set protocols bgp peer-group \<neighbor\> bfd - -Enable BFD on a BGP peer group -``` - -### Enable BFD in OSPF - -```{cfgcmd} set protocols ospf interface \<interface\> bfd - - Enable BFD for OSPF on an interface - -``` - -```{cfgcmd} set protocols ospfv3 interface \<interface\> bfd - -Enable BFD for OSPFv3 on an interface -``` - -### Enable BFD in ISIS - -```{cfgcmd} set protocols isis \<name\> interface \<interface\> bfd - -Enable BFD for ISIS on an interface - -``` - -## Operational Commands - -```{opcmd} show bfd peers - - Show all BFD peers - - :::{code-block} none - BFD Peers: - peer 198.51.100.33 vrf default interface eth4.100 - ID: 4182341893 - Remote ID: 12678929647 - Status: up - Uptime: 1 month(s), 16 hour(s), 29 minute(s), 38 second(s) - Diagnostics: ok - Remote diagnostics: ok - Local timers: - Receive interval: 300ms - Transmission interval: 300ms - Echo transmission interval: 50ms - Remote timers: - Receive interval: 300ms - Transmission interval: 300ms - Echo transmission interval: 0ms - - peer 198.51.100.55 vrf default interface eth4.101 - ID: 4618932327 - Remote ID: 3312345688 - Status: up - Uptime: 20 hour(s), 16 minute(s), 19 second(s) - Diagnostics: ok - Remote diagnostics: ok - Local timers: - Receive interval: 300ms - Transmission interval: 300ms - Echo transmission interval: 50ms - Remote timers: - Receive interval: 300ms - Transmission interval: 300ms - Echo transmission interval: 0ms - ::: -``` - -## BFD Static Route Monitoring - - -A monitored static route conditions the installation to the RIB on the BFD -session running state: when BFD session is up the route is installed to RIB, -but when the BFD session is down it is removed from the RIB. - - -### Configuration - -```{cfgcmd} set protocols static route \<subnet\> next-hop \<address\> bfd profile \<profile\> - -Configure a static route for \<subnet\> using gateway \<address\> -and use the gateway address as BFD peer destination address. -``` - -```{cfgcmd} set protocols static route \<subnet\> next-hop \<address\> bfd multi-hop source \<address\> profile \<profile\> - -Configure a static route for \<subnet\> using gateway \<address\>, -use source address to indentify the peer when is multi-hop session -and the gateway address as BFD peer destination address. -``` - -```{cfgcmd} set protocols static route6 \<subnet\> next-hop \<address\> bfd profile \<profile\> - -Configure a static route for \<subnet\> using gateway \<address\> -and use the gateway address as BFD peer destination address. -``` - -```{cfgcmd} set protocols static route6 \<subnet\> next-hop \<address\> bfd multi-hop source \<address\> profile \<profile\> - -Configure a static route for \<subnet\> using gateway \<address\>, -use source address to indentify the peer when is multi-hop session -and the gateway address as BFD peer destination address. -``` - -(bfd-operational-commands)= - -## Operational Commands - -```{opcmd} show bfd static routes - -Showing BFD monitored static routes - -:::{code-block} none -Showing BFD monitored static routes: - - Next hops: - VRF default IPv4 Unicast: - 10.10.13.3/32 peer 192.168.2.3 (status: installed) - 172.16.10.3/32 peer 192.168.10.1 (status: uninstalled) - - VRF default IPv4 Multicast: - - VRF default IPv6 Unicast: -::: -```
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