Cannot quite wrap my head about both Winbox and Terminal showing Actual MTU of VLAN interfaces (on a bridge) less than MTU: 1458 vs 1500. Smallest L2 MTU is 1560 for a WiFi interface.
Disregarding that, I don't even understand what can possible add that much overhead as there no IP tunnels.
Disregarding that, I don't even understand what can possible add that much overhead as there no IP tunnels.
Code:
> /interface/print detail Flags: D - dynamic; X - disabled, R - running; S - slave; P - passthrough 0 R name="ether1-gateway" default-name="ether1" type="ether" mtu=1500 actual-mtu=1500 l2mtu=1568 max-l2mtu=9214 mac-address=... ifname="eth0" ifindex=17 id=1 last-link-up-time=2023-12-07 16:29:21 link-downs=0 1 S name="ether2" default-name="ether2" type="ether" mtu=1500 actual-mtu=1500 l2mtu=1568 max-l2mtu=9214 mac-address=... ifname="eth1" ifindex=18 id=2 link-downs=0 2 RS name="ether3" default-name="ether3" type="ether" mtu=1500 actual-mtu=1500 l2mtu=1568 max-l2mtu=9214 mac-address=... ifname="eth2" ifindex=19 id=3 last-link-up-time=2023-12-07 16:29:21 link-downs=0 3 RS name="ether4" default-name="ether4" type="ether" mtu=1500 actual-mtu=1500 l2mtu=1568 max-l2mtu=9214 mac-address=... ifname="eth3" ifindex=20 id=4 last-link-up-time=2023-12-07 16:29:21 link-downs=0 4 RS name="ether5" default-name="ether5" type="ether" mtu=1500 actual-mtu=1500 l2mtu=1568 max-l2mtu=9214 mac-address=... ifname="eth4" ifindex=21 id=5 last-link-up-time=2023-12-07 16:29:18 link-downs=0 5 R name="bridge" type="bridge" mtu=auto actual-mtu=1500 l2mtu=1560 mac-address=... ifname="br0" ifindex=8 id=8 last-link-up-time=2023-12-07 16:29:04 link-downs=0 ... 9 R name="veth-alpine" type="veth" mtu=1500 actual-mtu=1500 mac-address=... ifname="veth27" ifindex=5 id=27 last-link-up-time=2023-12-07 16:29:04 link-downs=0 10 RS name="veth-iperf" type="veth" mtu=1500 actual-mtu=1500 mac-address=... ifname="veth31" ifindex=6 id=31 last-link-up-time=2023-12-07 16:29:04 link-downs=0 11 R name="veth-samba" type="veth" mtu=1500 actual-mtu=1500 mac-address=.... ifname="veth23" ifindex=4 id=23 last-link-up-time=2023-12-07 16:29:04 link-downs=0 12 R name="vlan-iot" type="vlan" mtu=1500 actual-mtu=1458 l2mtu=1556 mac-address=... ifname="vlan9" ifindex=11 id=9 last-link-up-time=2023-12-07 16:29:04 link-downs=0 13 R name="vlan-ipsec" type="vlan" mtu=1500 actual-mtu=1458 l2mtu=1556 mac-address=... ifname="vlan10" ifindex=12 id=10 last-link-up-time=2023-12-07 16:29:04 link-downs=0 14 R name="vlan-main" type="vlan" mtu=1500 actual-mtu=1458 l2mtu=1556 mac-address=... ifname="vlan11" ifindex=13 id=11 last-link-up-time=2023-12-07 16:29:04 link-downs=0 15 R name="vlan-tv" type="vlan" mtu=1500 actual-mtu=1458 l2mtu=1556 mac-address=... ifname="vlan13" ifindex=14 id=13 last-link-up-time=2023-12-07 16:29:04 link-downs=0 16 R name="vlan-work" type="vlan" mtu=1500 actual-mtu=1458 l2mtu=1556 mac-address=... ifname="vlan14" ifindex=15 id=14 last-link-up-time=2023-12-07 16:29:04 link-downs=0 17 S name="wifi-2.4" default-name="wifi2" type="wifi" actual-mtu=1500 l2mtu=1560 max-l2mtu=1560 mac-address=... ifname="ath2" ifindex=26 id=7 link-downs=0 18 RS name="wifi-5" default-name="wifi1" type="wifi" actual-mtu=1500 l2mtu=1560 max-l2mtu=1560 mac-address=... ifname="ath1" ifindex=25 id=6 last-link-up-time=2023-12-07 16:30:32 link-downs=0 19 RS name="wifi-iot" type="wifi" actual-mtu=1500 l2mtu=1560 max-l2mtu=1560 mac-address=... ifname="ath3" ifindex=27 id=17 last-link-up-time=2023-12-07 16:29:21 link-downs=0 20 R name="wifi-link" type="wifi" mtu=1542 actual-mtu=1542 l2mtu=1560 max-l2mtu=1560 mac-address=... ifname="ath4" ifindex=28 id=32 last-link-up-time=2023-12-07 16:29:21 link-downs=0 21 XS name="wifi-work-2.4" type="wifi" actual-mtu=1500 l2mtu=1560 max-l2mtu=1560 mac-address=... ifname="ath89" ifindex=118 id=18 last-link-down-time=2022-08-05 07:52:20 last-link-up-time=2022-08-05 07:46:09 link-downs=0 22 RS name="wifi-work-5" type="wifi" actual-mtu=1500 l2mtu=1560 max-l2mtu=1560 mac-address=... ifname="ath5" ifindex=29 id=19 last-link-up-time=2023-12-07 16:31:12 link-downs=0 Statistics: Posted by Kentzo — Fri Dec 08, 2023 3:47 am