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labsim: record the failover numbers and how they were nearly wrong
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The three T4 measurements (replace 26s, deny 148s, disable 21s), why deny is
the only one that sizes GRACE, and why 148s is a floor rather than a worst
case -- idle VMs, and an AC that shares an OVS bridge so `virsh destroy` lets
it see the peer vanish in a way a real BRAS never would.

Also writes down the broken setter that made the previous numbers fiction, so
the next person to touch the matrix knows to check the policy actually landed.
This commit is contained in:
Michal
2026-09-06 00:27:38 +01:00
parent 6987b324f1
commit 97efb5abb2
2 changed files with 108 additions and 21 deletions
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46
labsim/wan-failover-evidence/T0-baseline/state.txt
View File

@@ -1,27 +1,31 @@
=== 2026-09-06T00:06:00+01:00 ===
=== 2026-09-06T00:27:16+01:00 ===
--- AC sessions ---
ifname | username | ip | ip6 | ip6-dp | calling-sid | rate-limit | state | uptime | rx-bytes | tx-bytes
--------+----------+----------------+-----+--------+-------------------+------------+--------+----------+----------+----------
ppp0 | simdsl | 198.51.100.123 | | | 52:54:00:4e:0b:56 | | active | 00:03:19 | 438 B | 204 B
ppp1 | simdsl | 198.51.100.131 | | | 52:54:00:4e:0b:56 | | active | 00:04:24 | 1.1 KiB | 204 B
--- 172.31.1.252 ---
vip=172.31.1.1 holds_vip=no wan_disabled=yes wan_up=no ppp_up=no ppp_active=no may_dial=no lease_age=- dropin=yes role=backup
Sep 05 18:05:53 apitest vrrp-wan[3005490]: MASTER: dialling pppoe0
Sep 05 18:06:24 apitest vrrp-wan[3007095]: MASTER: dialling pppoe0
Sep 05 18:08:15 apitest vrrp-wan[3010461]: not MASTER: hanging up pppoe0
Sep 05 18:08:16 apitest vrrp-wan[3010622]: not MASTER but bond0.53 enabled -> releasing
Sep 05 18:08:40 apitest vrrp-wan[3012085]: bond0.53 disable commit took 24s
Sep 05 18:11:42 apitest vrrp-wan[3016900]: MASTER: dialling pppoe0
Sep 05 18:11:42 apitest vrrp-wan[3017050]: MASTER with bond0.53 disabled -> enabling
Sep 05 18:11:46 apitest vrrp-wan[3017685]: bond0.53 enable commit took 4s
Sep 05 23:07:43 apitest vrrp-wan[22667]: MASTER: dialling pppoe0
Sep 05 23:08:14 apitest vrrp-wan[24120]: MASTER: dialling pppoe0
-- Boot c5f23399239b468c8c8b752a4305c515 --
Sep 05 23:13:04 apitest vrrp-wan[6261]: MASTER: dialling pppoe0
Sep 05 23:13:04 apitest vrrp-wan[6413]: MASTER with bond0.53 disabled -> enabling
Sep 05 23:13:08 apitest vrrp-wan[7122]: bond0.53 enable commit took 4s
-- Boot 46727d256db344d6ad4b37c142272071 --
Sep 05 23:18:31 apitest vrrp-wan[6258]: MASTER: dialling pppoe0
Sep 05 23:18:31 apitest vrrp-wan[6411]: MASTER with bond0.53 disabled -> enabling
Sep 05 23:18:36 apitest vrrp-wan[7038]: bond0.53 enable commit took 5s
--- 172.31.1.253 ---
vip=172.31.1.1 holds_vip=yes wan_disabled=no wan_up=yes ppp_up=yes ppp_active=yes may_dial=yes lease_age=10 dropin=yes role=master
pppoe0 UNKNOWN 198.51.100.123 peer 198.51.100.1/32
default nhid 93 dev pppoe0 proto static metric 20
Sep 05 22:54:48 vyos vrrp-wan[193770]: MASTER: dialling pppoe0
Sep 05 22:55:18 vyos vrrp-wan[194885]: MASTER: dialling pppoe0
Sep 05 22:55:49 vyos vrrp-wan[195925]: MASTER: dialling pppoe0
Sep 05 22:56:19 vyos vrrp-wan[196724]: DIAL FLAP: >=6 attempts in 600s -- holding off 900s
Sep 05 22:57:24 vyos vrrp-wan[199011]: MASTER with bond0.53 disabled -> enabling
Sep 05 22:57:28 vyos vrrp-wan[199711]: bond0.53 enable commit took 4s
Sep 05 22:57:40 vyos vrrp-wan[199948]: GUARD: lease stale (81s > 75s; is vrrp-wan-reconcile.timer running?) -- hanging up pppoe0
Sep 05 23:02:41 vyos vrrp-wan[206596]: MASTER: dialling pppoe0
vip=172.31.1.1 holds_vip=yes wan_disabled=no wan_up=yes ppp_up=yes ppp_active=yes may_dial=yes lease_age=19 dropin=yes role=master
pppoe0 UNKNOWN 198.51.100.131 peer 198.51.100.1/32
default nhid 57 dev pppoe0 proto static metric 20
Sep 05 23:10:44 vyos vrrp-wan[221212]: MASTER with bond0.53 disabled -> enabling
Sep 05 23:10:48 vyos vrrp-wan[221995]: bond0.53 enable commit took 4s
-- Boot 1f635fc6900c4661b3ac6d016d63d293 --
Sep 05 23:16:10 vyos vrrp-wan[7037]: MASTER: dialling pppoe0
Sep 05 23:16:11 vyos vrrp-wan[7190]: MASTER with bond0.53 disabled -> enabling
Sep 05 23:16:15 vyos vrrp-wan[7979]: bond0.53 enable commit took 4s
-- Boot c0e38585d7354ad6ab018800c7f3f6be --
Sep 05 23:22:54 vyos vrrp-wan[5970]: MASTER: dialling pppoe0
Sep 05 23:22:54 vyos vrrp-wan[6126]: MASTER with bond0.53 disabled -> enabling
Sep 05 23:22:59 vyos vrrp-wan[6915]: bond0.53 enable commit took 5s