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-rw-r--r--interface-ip.c9
1 files changed, 7 insertions, 2 deletions
diff --git a/interface-ip.c b/interface-ip.c
index ea4c3dd..56f8bd9 100644
--- a/interface-ip.c
+++ b/interface-ip.c
@@ -456,8 +456,13 @@ interface_set_prefix_address(struct interface *iface, bool add,
addr.valid_until = assignment->prefix->valid_until;
if (!add) {
- if (assignment->enabled)
- system_del_address(l3_downlink, &addr);
+ if (assignment->enabled) {
+ time_t now = system_get_rtime();
+ addr.preferred_until = now;
+ if (addr.valid_until - now > 7200)
+ addr.valid_until = now + 7200;
+ system_add_address(l3_downlink, &addr);
+ }
} else {
system_add_address(l3_downlink, &addr);