Prefix Limits
BGP prefix limits and filtering policies for AS202941
Our Announcements
AS202941 announces the following number of prefixes:
5
IPv4 Prefixes
15
IPv6 Prefixes
We recommend setting prefix limits on your side with a 20% buffer above our current count to accommodate growth.
Recommended Limits for Peers
When configuring your BGP session with AS202941, we recommend the following prefix limits:
| IPv4 Maximum | 50 (with 100% buffer) |
|---|---|
| IPv6 Maximum | 50 (with 100% buffer) |
| Action on Limit | Restart session after 30 minutes (recommended) |
Minimum Prefix Size
We filter prefixes based on the following minimum sizes:
| IPv4 Minimum | /24 - We do not accept prefixes longer than /24 |
|---|---|
| IPv6 Minimum | /48 - We do not accept prefixes longer than /48 |
| Bogon Filtering | We reject RFC1918, RFC6890, and other bogon prefixes |
Example Configuration
Cisco IOS-XR
neighbor 2001:db8::1
remote-as 202941
description 256K-Network
address-family ipv4 unicast
maximum-prefix 50 80 restart 30
address-family ipv6 unicast
maximum-prefix 50 80 restart 30Juniper JunOS
set protocols bgp group PEERS neighbor 2001:db8::1 family inet unicast prefix-limit maximum 50
set protocols bgp group PEERS neighbor 2001:db8::1 family inet unicast prefix-limit teardown 80 idle-timeout 30
set protocols bgp group PEERS neighbor 2001:db8::1 family inet6 unicast prefix-limit maximum 50
set protocols bgp group PEERS neighbor 2001:db8::1 family inet6 unicast prefix-limit teardown 80 idle-timeout 30BIRD 2
protocol bgp AS202941 {
neighbor 2001:db8::1 as 202941;
ipv4 {
receive limit 50 action restart;
};
ipv6 {
receive limit 50 action restart;
};
}