My ISP provides connection via DHCP. Every 5 minutes or so when dhcpleased is renewing the lease, my default route disappears for a few seconds.
Definitely I'll be looking at requesting a longer lease by putting a setting in /etc/dhclient.conf but is there any way I can stop the default route disappearing with each renew event? The route didn't disappear when I tested with NetBSD and Linux. This seems like I'm missing a setting in dhclient.conf to make the default route sticky? I can't see any obvious answers in the man page for dhclient.conf unfortunately. (IP fudged log snippet below) May 10 12:23:21 openbsd-gateway dhcpleased[77979]: deleting nameservers x.x.x.x x.x.x.x (lease from x.x.x.1 on cnmac2) May 10 12:23:21 openbsd-gateway dhcpleased[77979]: deleting x.x.x.30 from cnmac2 (lease from x.x.x.1) May 10 12:23:23 openbsd-gateway dhcpleased[77979]: adding x.x.x.30 to cnmac2 (lease from x.x.x.1) May 10 12:23:23 openbsd-gateway dhcpleased[77979]: adding nameservers x.x.x.x x.x.x.x (lease from x.x.x.1 on cnmac2) May 10 12:28:23 openbsd-gateway dhcpleased[77979]: deleting nameservers x.x.x.x x.x.x.x (lease from x.x.x.1 on cnmac2) May 10 12:28:23 openbsd-gateway dhcpleased[77979]: deleting x.x.x.30 from cnmac2 (lease from x.x.x.1) May 10 12:28:25 openbsd-gateway dhcpleased[77979]: adding x.x.x.30 to cnmac2 (lease from x.x.x.1) May 10 12:28:25 openbsd-gateway dhcpleased[77979]: adding nameservers x.x.x.x x.x.x.x (lease from x.x.x.1 on cnmac2) May 10 12:33:26 openbsd-gateway dhcpleased[77979]: deleting nameservers x.x.x.x x.x.x.x (lease from x.x.x.1 on cnmac2) May 10 12:33:26 openbsd-gateway dhcpleased[77979]: deleting x.x.x.30 from cnmac2 (lease from x.x.x.1) May 10 12:33:28 openbsd-gateway dhcpleased[77979]: adding x.x.x.30 to cnmac2 (lease from x.x.x.1) May 10 12:33:28 openbsd-gateway dhcpleased[77979]: adding nameservers x.x.x.x x.x.x.x (lease from x.x.x.1 on cnmac2) May 10 12:38:28 openbsd-gateway dhcpleased[77979]: deleting nameservers x.x.x.x x.x.x.x (lease from x.x.x.1 on cnmac2) May 10 12:38:28 openbsd-gateway dhcpleased[77979]: deleting x.x.x.30 from cnmac2 (lease from x.x.x.1) May 10 12:38:30 openbsd-gateway dhcpleased[77979]: adding x.x.x.30 to cnmac2 (lease from x.x.x.1) May 10 12:38:30 openbsd-gateway dhcpleased[77979]: adding nameservers x.x.x.x x.x.x.x (lease from x.x.x.1 on cnmac2)
