[筆記] frr + wireguard + bgp 需要 link local address
Log:
```
bgpd[99576]: [YXTCF-6ENSA][EC 33554510] Interface: wgXX does not have a v6 LL address associated with it, waiting until one is created for it
bgpd[99576]: [P90Z5-FP0GJ][EC 33554461] <remote ip>: nexthop_set failed, local: [<local ip>]:55004 remote: [<remote ip>]:179 update_if: (None) resetting connection - intf wgXX
bgpd[99576]: [NQGZV-Y3W62][EC 100663299] bgp_connect_success: bgp_getsockname(): failed for peer <remote ip>, fd 25
bgpd[99576]: [J9K4Q-T8STY][EC 33554466] <remote ip> [FSM] Failure handling event TCP_connection_open in state Connect, prior events BGP_Start, BGP_Start, fd 25, last reset: BGP Notification send
```
`show bgp neighbors`
```
Notification sent (Neighbor Events Error/Unspecific)
```
Conf:
```
[Interface]
PrivateKey = <...>
Address = <global ipv6>, fe80::215:191/96
ListenPort = 25993
Table = off
[Peer]
Endpoint = <...>
PublicKey = <...>
PersistentKeepalive = 25
AllowedIPs = 0.0.0.0/0, ::/0
```
*add `fe80::215:191/96`*
Ref: https://github.com/FRRouting/frr/issues/12229
2024-07-24 03:01:58
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