Hello everyone,
during the configuration of router I've disabled routes requesting by dhclient:
# cat /etc/dhclient.conf
initial-interval 1;
send host-name "cerber";
# request subnet-mask, broadcast-address, routers, domain-name,
# domain-name-servers, host-name;
request subnet-mask, broadcast-address, domain-name,
domain-name-servers, host-name;
By the way, I've checked dhclient.leases.rl1 and it seems that renewal
interval for rl1 is 30 minutes (as you may remember I've discovered
that routes disappear in 30 minutes interval). It seems you're right,
it's dhclient.
--
BR,
Sergey Khentov