Error: Hold timer expired

[Łukasz Trąbiński]

Hi

Try set „multihop 10” for example.

> Wiadomość napisana przez Marek Królikowski <admin at wset.edu.pl> w dniu 08.08.2017, o godz. 17:57:
> 
> Hello guys,
> I buy VPS with BGP and try setup BGP session but got strange problem.
> VPS support send me this information to setup session:
> "Please peer with 185.144.XXX.YYY, you will need to enable eBGP multihop.
> Our ASN is XXXX.
> The IPv6 peer address is 2a04:9dc0:XX:YYY::1"
> 
> My bird configuration looks like this:
> ---------------------------------------
> router id 85.204.XXX.YYY;
> # debug protocols all;
> protocol device {
> scan time 10;
> }
> 
> protocol static {
>        route 2a04:9dc0:XX:YYY::1/128 via "eth0";
> }
> 
> protocol kernel {
>        device routes;
>        import none;
>        scan time 15;
>        export filter {
>        if net = 2a04:9dc0:XX:YYY::1/128 then reject;
>        if source = 2a04:9dc0:XX:YYY::1/128 then reject;
>        accept;
>        };
> }
> 
> protocol bgp Romania
> {
>    description "Romania link local";
>    local as YYYYY;
>    source address 2a04:9dc0:X:YY::f0;
>    graceful restart on;
>    default bgp_local_pref 200;
>    multihop 2;
>    neighbor 2a04:9dc0:XX:YYY::1 as XXXX;
>    import filter {
>    if net = 2a04:9dc0:XX:YYY::1/128 then reject;
>    if source = 2a04:9dc0:XX:YYY::1/128 then reject;
>    if bgp_path.len > 49 then reject;
>    accept;
>    };
>    export filter {
>    if net = 2a07:1c44:3511::/48 then accept;
>    reject;
> };
> }
> ---------------------------------------
> 
> In logs got it:
> Aug  8 16:21:41 ro-bgp bird6: Romania: Error: Hold timer expired
> Aug  8 16:24:02 ro-bgp bird6: Romania: Error: Hold timer expired
> Aug  8 16:27:07 ro-bgp bird6: Romania: Error: Hold timer expired
> Aug  8 16:35:58 ro-bgp bird6: Romania: Error: Hold timer expired
> Aug  8 16:37:25 ro-bgp bird6: Romania: Error: Hold timer expired
> Aug  8 16:39:27 ro-bgp bird6: Romania: Error: Hold timer expired
> Aug  8 16:41:57 ro-bgp bird6: Romania: Error: Hold timer expired
> Aug  8 16:56:19 ro-bgp bird6: Romania: Error: Hold timer expired
> Aug  8 17:00:29 ro-bgp bird6: Romania: Error: Hold timer expired
> Aug  8 17:06:10 ro-bgp bird6: Romania: Error: Hold timer expired
> Aug  8 17:09:58 ro-bgp bird6: Romania: Error: Hold timer expired
> Aug  8 17:13:01 ro-bgp bird6: Romania: Error: Hold timer expired
> Aug  8 17:15:08 ro-bgp bird6: Romania: Error: Hold timer expired
> Aug  8 17:18:15 ro-bgp bird6: Romania: Error: Hold timer expired
> Aug  8 17:22:58 ro-bgp bird6: Romania: Error: Hold timer expired
> Aug  8 17:29:17 ro-bgp bird6: Romania: Error: Hold timer expired
> Aug  8 17:31:49 ro-bgp bird6: Romania: Error: Hold timer expired
> Aug  8 17:35:17 ro-bgp bird6: Romania: Error: Hold timer expired
> Aug  8 17:40:08 ro-bgp bird6: Romania: Error: Hold timer expired
> 
> 
> root at bgp:~# birdc6 show protocols all Romania
> BIRD 1.6.3 ready.
> name     proto    table    state  since       info
> Romania  BGP      master   up     16:22:37    Established
>  Description:    Romania link local
>  Preference:     100
>  Input filter:   (unnamed)
>  Output filter:  (unnamed)
>  Routes:         11560 imported, 5 exported, 11560 preferred
>  Route change stats:     received   rejected   filtered    ignored
> accepted
>    Import updates:          11560          0          0          0
> 11560
>    Import withdraws:            0          0        ---          0
> 0
>    Export updates:          11586      11560         21        ---
> 5
>    Export withdraws:            0        ---        ---        ---
> 0
>  BGP state:          Established
>    Neighbor address: 2a04:9dc0:XX:YYY::1
>    Neighbor AS:     XXXX
>    Neighbor ID:      185.144.XXXX
>    Neighbor caps:    refresh restart-aware AS4
>    Session:          external multihop AS4
>    Source address:   2a04:9dc0:X:YY::f0;
>    Hold timer:       27/90
>    Keepalive timer:  23/30
> 
> root at bgp:~# birdc6 show protocols all Romania
> BIRD 1.6.3 ready.
> name     proto    table    state  since       info
> Romania  BGP      master   start  16:24:05    Idle          BGP Error: Hold
> timer expired
>  Description:    Romania link local
>  Preference:     100
>  Input filter:   (unnamed)
>  Output filter:  (unnamed)
>  Routes:         0 imported, 0 exported, 0 preferred
>  Route change stats:     received   rejected   filtered    ignored
> accepted
>    Import updates:              0          0          0          0
> 0
>    Import withdraws:            0          0        ---          0
> 0
>    Export updates:              0          0          0        ---
> 0
>    Export withdraws:            0        ---        ---        ---
> 0
>  BGP state:          Idle
>    Neighbor address: 2a04:9dc0:XX:YYY::1
>    Neighbor AS:      XXXX
>    Error wait:       57/120
>    Last error:       BGP Error: Hold timer expired
> 
> 
> Best Regards
> Marek Krolikowski
> 
>