BGP on GRE Idle

1 Aug 2021

      Hi,My configuration file can work normally on the wireguard tunnel, but GRE
does not work.

Server1

11: home_1_vpn: <POINTOPOINT,NOARP,UP,LOWER_UP> mtu 1280 qdisc noqueue
state UNKNOWN group default qlen 1000
   link/none
   inet 5.101.92.125/32 scope global home_1_vpn
      valid_lft forever preferred_lft forever
root@ll-ix:~# ip route get 2602:feda:ab4:5247:5247:5247:5247:5247
2602:feda:ab4:5247:5247:5247:5247:5247 from :: dev frc_ca src
2602:feda:ab2:5247:5247:5247:5247:5247 metric 1024 pre
f medium

root@ll-ix:~# birdc s p a FRC_CA
BIRD 2.0.7 ready.
Name       Proto      Table      State  Since         Info
FRC_CA     BGP        ---        start  2021-07-31    Idle
 BGP state:          Idle
   Neighbor address: 2602:feda:ab4:5247:5247:5247:5247:5247%frc_ca
   Neighbor AS:      141011
   Local AS:         141011
 Channel ipv6
   State:          DOWN
   Table:          master6
   Preference:     100
   Input filter:   (unnamed)
   Output filter:  (unnamed)

root@ll-ix:~# birdc s p
HOME_1_ARCH BGP        ---        up     2021-07-31    Established
The protocol home_1_arch use the same template as Server 1 and Server 2,but
it do Established.The only difference is using Wireguard as tun,I don't
think I have a problem with the IP configuration on Server1 and Server2.
protocol bgp FRC_CA from tpl_ibgp {
source address 2602:feda:ab2:5247:5247:5247:5247:5247;
neighbor 2602:feda:ab4:5247:5247:5247:5247:5247 as 141011;
}

Server2
9: ll_ix@NONE: <POINTOPOINT,NOARP,UP,LOWER_UP> mtu 1476 qdisc noqueue state
UNKNOWN group default qlen 1000
   link/gre 104.218.61.232 peer 5.189.255.107
   inet6 2602:feda:ab4:5247:5247:5247:5247:5247/128 scope global
      valid_lft forever preferred_lft forever
   inet6 fe80::200:5efe:68da:3de8/64 scope link
      valid_lft forever preferred_lft forever
root@vpsuser:~# ip route get 2602:feda:ab4:5247:5247:5247:5247:5247
local 2602:feda:ab4:5247:5247:5247:5247:5247 from :: dev lo table local
proto kernel src 2602:feda:ab4:5247:5247:524
7:5247:5247 metric 0 pref medium
root@vpsuser:~# birdc s p a LL_IX
BIRD 2.0.7 ready.
Name       Proto      Table      State  Since         Info
LL_IX      BGP        ---        start  02:48:26.395  Idle
 BGP state:          Idle
   Neighbor address: 2602:feda:ab2:5247:5247:5247:5247:5247
   Neighbor AS:      141011
   Local AS:         141011
 Channel ipv6
   State:          DOWN
   Table:          master6
   Preference:     100
   Input filter:   (unnamed)
   Output filter:  (unnamed)

protocol bgp LL_IX from tpl_ibgp {
source address 2602:feda:ab4:5247:5247:5247:5247:5247;
neighbor 2602:feda:ab2:5247:5247:5247:5247:5247 as 141011;
}

Both Server use the same template,As shown below
template bgp tpl_ibgp {
local as LOCAL_ASN;
rr client;
direct;
ipv6 {
next hop self;
import filter {
if is_bogon_asn() then {
print "is bogon asn", net, " for ASN ", bgp_path.last;
reject;
}
if is_bogon_prefix() then {
print "is bogon prefix", net, " for ASN ", bgp_path.last;
reject;
}
accept;
};
export filter {
if bgp_export_all() then accept;
reject;
};
};
}
Please help me,thanks.

BGP on GRE Idle

智慧雨泽