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Maniphest T2679

VRRP with BFD Failure Detection
Closed, ResolvedPublicFEATURE REQUEST
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Description

In many vendor products it is possible to use BFD to quickly detect failures and perform a VRRP transition. This should provide a much quicker response time, and therefore less packet loss:
https://tools.ietf.org/id/draft-nitish-vrrp-bfd-p2p-01.html

Can this be considered for a future feature? Here are a few vendors that support it:
https://www.cisco.com/c/en/us/td/docs/routers/asr9000/software/asr9k_r4-1/addr_serv/configuration/guide/ipaddr_cg41a9k_chapter10.html#con_1134347
https://www.arista.com/en/um-eos/eos-section-37-2-bfd-configuration#ww1114343
https://support.huawei.com/enterprise/en/doc/EDOC1100102953/c69cbfd6/bfd-for-vrrp

Details

Difficulty level
Unknown (require assessment)
Version
-
Why the issue appeared?
Will be filled on close
Is it a breaking change?
Perfectly compatible
Issue type
Feature (new functionality)

Event Timeline

trae32566 created this task.Jul 4 2020, 3:26 AM
c-po added a subscriber: c-po.Jul 4 2020, 6:42 AM

Availible in keepalived, thus kt could be considered for 1.3

pasik added a subscriber: pasik.Jul 4 2020, 8:33 AM
Viacheslav added a subscriber: Viacheslav.Jan 18 2021, 8:50 PM

"the VRRP instance will only be able to come up if both VRRP instance are running, which somewhat defeats the purpose of VRRP. " ref https://manpages.debian.org/buster/keepalived/keepalived.conf.5.en.html

Not sure that is a good idea

global_defs {
    dynamic_interfaces
    script_user root
    notify_fifo /run/keepalived_notify_fifo
    notify_fifo_script /usr/libexec/vyos/system/keepalived-fifo.py
}

## MY BFD INSTANCE
bfd_instance bfd-inst-01 {
    neighbor_ip 192.0.2.56
    source_ip 192.0.2.55
    min_tx 100
    min_rx 100
    max_hops 255
}


vrrp_instance GRP {
    
    state BACKUP
    interface eth1
    virtual_router_id 99
    priority 90
    advert_int 1

        preempt_delay 0
    
        unicast_peer { 192.0.2.56 }
    
    
    
    
    virtual_ipaddress {
            192.0.2.1/32
        }
    track_bfd { bfd-inst-01 }
    
    }

With only one instance it fails

root@r5-roll:/home/vyos# systemctl status keepalived
● keepalived.service - Keepalive Daemon (LVS and VRRP)
   Loaded: loaded (/lib/systemd/system/keepalived.service; disabled; vendor preset: enabled)
  Drop-In: /etc/systemd/system/keepalived.service.d
           └─override.conf
   Active: active (running) since Mon 2021-01-18 22:44:22 EET; 9s ago
 Main PID: 24401 (keepalived)
    Tasks: 2 (limit: 546)
   Memory: 3.4M
   CGroup: /system.slice/keepalived.service
           ├─24401 /usr/sbin/keepalived --dont-fork --snmp
           └─30436 /usr/sbin/keepalived --dont-fork --snmp

Jan 18 22:44:32 r5-roll Keepalived[24401]: BFD child process(30423) died: Respawning
Jan 18 22:44:32 r5-roll Keepalived[24401]: BFD child process(30424) died: Respawning
Jan 18 22:44:32 r5-roll Keepalived[24401]: BFD child process(30425) died: Respawning
Jan 18 22:44:32 r5-roll Keepalived[24401]: BFD child process(30426) died: Respawning
Jan 18 22:44:32 r5-roll Keepalived[24401]: BFD child process(30427) died: Respawning
Jan 18 22:44:32 r5-roll Keepalived[24401]: BFD child process(30428) died: Respawning
Jan 18 22:44:32 r5-roll Keepalived[24401]: BFD child process(30429) died: Respawning
Jan 18 22:44:32 r5-roll Keepalived[24401]: BFD child process(30430) died: Respawning
Jan 18 22:44:32 r5-roll Keepalived[24401]: BFD child process(30433) died: Respawning
Jan 18 22:44:32 r5-roll Keepalived[24401]: BFD child process(30434) died: Respawning
Jan 18 22:44:32 r5-roll Keepalived[24401]: BFD child process(30436) died: Respawning
root@r5-roll:/home/vyos#
trae32566 closed this task as Resolved.Jan 18 2021, 10:18 PM
trae32566 claimed this task.

Interesting. I agree, I think that defeats the purpose of VRRP if both have to be running. I guess we can go ahead and close this as not feasible at this time.

c-po moved this task from Need Triage to Finished on the VyOS 1.3 Equuleus board.May 27 2021, 5:43 PM
erkin set Issue type to Feature (new functionality).Aug 29 2021, 1:56 PM
erkin removed a subscriber: Active contributors.
syncer edited projects, added VyOS 1.3 Equuleus (1.3.0); removed VyOS 1.3 Equuleus.Aug 29 2022, 12:17 PM
syncer moved this task from Need Triage to Finished on the VyOS 1.3 Equuleus (1.3.0) board.