Feature #11103
closed
Use virtual link local IP address as RA source address for HA environments
Added by znerol znerol almost 4 years ago.
Updated over 3 years ago.
Category:
IPv6 Router Advertisements (radvd/rtsold)
Plus Target Version:
21.05
Description
If radvd is configured with RA interface set to a virtual link local IP, then add it to AdvRASrcAddress in radvd.conf. This ensures that the virtual IP is advertised as the gateway address to clients.
More background:
Filed PR: https://github.com/pfsense/pfsense/pull/4487
Instructions for testing this feature:
- Setup HA cluster with primary and fallback
- Setup a IPv6 link-local VIP on the LAN interface, e.g.:
fe80::1:1
- Configure the link-local VIP as the
RA Interface on primary and fallback hosts
Observe that:
radvd.conf is present with a configuration section for the LAN interface on both machines (primary and fallback)radvd.conf includes an AdvRASrcAddress section- RA packets are sent by the primary host with the VIP as source address, no RA packets are sent by the fallback host.
- RA packets are sent by the fallback host with the VIP as source address as soon as the VIP switches over to the fallback host. No RA packets are sent by the primary host.
- Default route on client machines stays the same regardless whether the VIP is currently on primary or fallback host.
- Status changed from New to Pull Request Review
- Target version set to CE-Next
- Status changed from Pull Request Review to Feedback
- Assignee set to Renato Botelho
PR has been merged. Thanks!
- Status changed from Feedback to Pull Request Review
- Target version changed from CE-Next to 2.6.0
- Plus Target Version set to 21.05
- Status changed from Pull Request Review to Feedback
- Subject changed from radvd: use virtual link local IP as source address in HA setups to Use virtual link local IP address as RA source address for HA environments
Updating subject for release notes.
- Status changed from Feedback to Resolved
works as expected on 21.05.r.20210526.1807
`AdvRASrcAddress` in `/var/etc/radvd.conf`:
# Automatically Generated, do not edit
# Generated for DHCPv6 Server lan
interface vtnet0 {
AdvSendAdvert on;
AdvRASrcAddress {
fe80:88::7272;
};
MinRtrAdvInterval 5;
MaxRtrAdvInterval 20;
AdvDefaultLifetime 60;
AdvLinkMTU 1500;
AdvDefaultPreference medium;
AdvManagedFlag on;
AdvOtherConfigFlag on;
prefix fc00:88::/64 {
DeprecatePrefix off;
AdvOnLink on;
AdvAutonomous on;
AdvValidLifetime 86400;
AdvPreferredLifetime 14400;
};
route ::/0 {
AdvRoutePreference medium;
RemoveRoute off;
};
RDNSS fc00:88::72 {
AdvRDNSSLifetime 60;
};
DNSSL home.arpa { };
};
it's better to hide non-linklocal VIPs from the dropdown menu, but this is not critical
- Target version changed from 2.6.0 to 2.5.2
- Related to Regression #12582: RADVD can be started on both HA nodes when configured with an IPv6 link-local address added
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Updated by Viktor Gurov