Bandura Communications has registered AS number 4242422924 in dn42 for experimentation and monitoring.
- Monitoring: The Lab AS is used to monitor the main network AS4242422923 and AS4201272923. For this purpose, the software Uptime Kuma is used, which is connected to dn42. This can be used to check whether certain functions such as DNS or Anycast are working.
- Experiments: The Lab AS can assign /64 or /56 IPv6 networks for experimentation.
In contrast to the main network, the Lab AS is located on a single node in Germany, Nuremberg.
Peering
Peering policy: Closed / Selective
BGP communities
| Communitiy |
Name |
Description |
| 65535:65281 |
no-export |
do not advertise to any eBGP peers (implemented by bird) |
| 65535:65282 |
no-advertise |
do not advertise to any BGP peer (implemented by bird) |
| 65535:65283 |
no-export-subconfed |
do not advertise to any eBGP peer or to confederation (implemented by bird) |
| 64511:(1-9) |
Latency |
Community, which specifies the maximum latency. |
| 64511:(21-29) |
Bandwidth |
Community, which specifies the minimum bandwidth. |
| 64511:(31-34) |
Crypto / Encryption |
Community, which specifies how the transmitted data is encrypted. |
| 64511:(41-57) |
Region |
BGP communities for route origin |
| 64511:(1000-1999) |
Country |
BGP communities for route origin |
| 4242422924:5:1 |
Physical connection |
| 4242422924:5:2 |
Connection over Internet Exchange Points (Manually or via router server) |
| 4242422924:5:3 |
Connection over Tunnel |
| 4242422924:5:4 |
Connection over Virtual Internet Exchange Points (Manually or via router server) |
| 4242422924:5:5 |
Unknown type |
see RFC1997, RFC8642, Bird communities
Filters
The following filters are applied to imported routes:
- IPv4 is not supported
- Only valid dn42 networks are accepted
- The own network is not imported
- Routes with path length over 25 are filtered
- Routes containing blacklisted ASNs will be filtered
- Routes that do not have a valid ROA (does not accept unknown) are filtered.
- IP packets with a source address from our networks are denied.
Routing Policy
- Prefer route with the highest Local Preference attribute.
- Prefer route with the shortest AS path.
- Prefer the lowest value of the Multiple Exit Discriminator.
- Prefer routes received via eBGP over ones received via iBGP.
- Prefer older routes.
see BIRD 2.0 User’s Guide 6.3 BGP
bgp_med
bgp_med |
Description |
0 |
default |
+ ( 4 - [1-4] ) * 600 |
Crypto class |
+ ( 9 - [1-9] ) * 100 |
Bandwidth class |
+ ( [1-9] - 1 ) * 300 |
Latency class |
+ ( [1-5] - 1 ) * 10 |
Link class |
bgp_local_pref
bgp_local_pref |
Description |
0 |
graceful shutdown |
100 |
default |
+ 500 |
Direct peer (AS path length = 1) |
| +/- manuel configured |
For example, in case of latency problems or slow connections. |
Numbers and Addresses
| AS |
4242422924 |
| IPv6 net |
fd00:8e13:ce5d::/48 |
| Prefix |
Usage |
fd00:8e13:ce5d::/48 |
Full prefix |
- fd00:8e13:ce5d::/64 |
Nodes |
- - fd00:8e13:ce5d::/112 |
Nodes addresses |
- fd00:8e13:ce5d:4e90::/60 |
Lab 4e90 |
- fd00:8e13:ce5d:cb00::/56 |
Lab cb00 |
Nodes
| Name |
Location |
Bandwidth |
Provider |
Note |
| srv.dn42-lab.de |
Nuremberg, Germany |
1Gbit/s (shared) |
Netcup |
|
IP addresses of my nodes:
| Name |
IPv6 |
| srv.dn42-lab.de |
fd00:8e13:ce5d::1, fd00:8e13:ce5d::53, fd00:8e13:ce5d::2924 (for ULA peering), fd00:8e13:ce5d::9743 |
Peerings
