mirror of
https://git.proxmox.com/git/pve-docs
synced 2025-10-05 00:42:24 +00:00
vxlan: increase mtu to 1550
vxlan encapsulation have 50 bytes overhead,so we need to increase mtu on physical interfaces to avoid fragmentation.
This commit is contained in:
Alexandre Derumier
Wolfgang Bumiller
parent
83c80b5d9a
commit
47cf2d10c2
@ -16,6 +16,9 @@ while accommodating a very large number of tenants. It is defined in RFC 7348.
|
||||
Each overlay network is known as a VXLAN Segment and identified by a unique
|
||||
24-bit segment ID called a VXLAN Network Identifier (VNI).
|
||||
|
||||
VXLAN encapsulation add 50bytes overhead, so you need to increase mtu on your host
|
||||
physical interfaces to 1550 at minimum. (or decrease mtu inside your vms to 1450)
|
||||
|
||||
For BUM traffic (broadcast / unknown unicast traffic, multicast),
|
||||
we have 3 differents vxlan setup modes : multicast, unicast, bgp-evpn
|
||||
|
||||
@ -36,6 +39,7 @@ remote VTEPs will get the packet and answer accordingly direct to the originatin
|
||||
----
|
||||
auto eno1
|
||||
iface eno1 inet manual
|
||||
mtu 1550
|
||||
|
||||
auto vmbr0
|
||||
iface vmbr0 inet static
|
||||
@ -74,6 +78,7 @@ iface vmbr3 inet manual
|
||||
----
|
||||
auto eno1
|
||||
iface eno1 inet manual
|
||||
mtu 1550
|
||||
|
||||
auto vmbr0
|
||||
iface vmbr0 inet static
|
||||
@ -113,6 +118,7 @@ iface vmbr3 inet manual
|
||||
----
|
||||
auto eno1
|
||||
iface eno1 inet manual
|
||||
mtu 1550
|
||||
|
||||
auto vmbr0
|
||||
iface vmbr0 inet static
|
||||
@ -161,6 +167,7 @@ The VXLAN device will still learn remote addresses automatically using source-ad
|
||||
----
|
||||
auto eno1
|
||||
iface eno1 inet manual
|
||||
mtu 1550
|
||||
|
||||
auto vmbr0
|
||||
iface vmbr0 inet static
|
||||
@ -203,6 +210,7 @@ iface vmbr3 inet manual
|
||||
----
|
||||
auto eno1
|
||||
iface eno1 inet manual
|
||||
mtu 1550
|
||||
|
||||
auto vmbr0
|
||||
iface vmbr0 inet static
|
||||
@ -244,6 +252,7 @@ iface vmbr3 inet manual
|
||||
----
|
||||
auto eno1
|
||||
iface eno1 inet manual
|
||||
mtu 1550
|
||||
|
||||
auto vmbr0
|
||||
iface vmbr0 inet static
|
||||
@ -296,6 +305,7 @@ it's possible to use external bgp route reflector servers.
|
||||
----
|
||||
auto eno1
|
||||
iface eno1 inet manual
|
||||
mtu 1550
|
||||
|
||||
auto vmbr0
|
||||
iface vmbr0 inet static
|
||||
@ -363,6 +373,7 @@ line vty
|
||||
----
|
||||
auto eno1
|
||||
iface eno1 inet manual
|
||||
mtu 1550
|
||||
|
||||
auto vmbr0
|
||||
iface vmbr0 inet static
|
||||
@ -429,6 +440,7 @@ line vty
|
||||
----
|
||||
auto eno1
|
||||
iface eno1 inet manual
|
||||
mtu 1550
|
||||
|
||||
auto vmbr0
|
||||
iface vmbr0 inet static
|
||||
@ -526,6 +538,7 @@ net.ipv6.conf.all.forwarding=1
|
||||
----
|
||||
auto eno1
|
||||
iface eno1 inet manual
|
||||
mtu 1550
|
||||
|
||||
auto vmbr0
|
||||
iface vmbr0 inet static
|
||||
@ -600,6 +613,7 @@ line vty
|
||||
----
|
||||
auto eno1
|
||||
iface eno1 inet manual
|
||||
mtu 1550
|
||||
|
||||
auto vmbr0
|
||||
iface vmbr0 inet static
|
||||
@ -674,6 +688,7 @@ line vty
|
||||
----
|
||||
auto eno1
|
||||
iface eno1 inet manual
|
||||
mtu 1550
|
||||
|
||||
auto vmbr0
|
||||
iface vmbr0 inet static
|
||||
@ -779,6 +794,7 @@ iface vrf1
|
||||
|
||||
auto eno1
|
||||
iface eno1 inet manual
|
||||
mtu 1550
|
||||
|
||||
auto vmbr0
|
||||
iface vmbr0 inet static
|
||||
@ -888,6 +904,7 @@ iface vrf1
|
||||
|
||||
auto eno1
|
||||
iface eno1 inet manual
|
||||
mtu 1550
|
||||
|
||||
auto vmbr0
|
||||
iface vmbr0 inet static
|
||||
@ -998,6 +1015,7 @@ iface vrf1
|
||||
|
||||
auto eno1
|
||||
iface eno1 inet manual
|
||||
mtu 1550
|
||||
|
||||
auto vmbr0
|
||||
iface vmbr0 inet static
|
||||
@ -1118,6 +1136,7 @@ iface vrf1
|
||||
|
||||
auto eno1
|
||||
iface eno1 inet manual
|
||||
mtu 1550
|
||||
|
||||
auto vmbr0
|
||||
iface vmbr0 inet static
|
||||
@ -1237,6 +1256,7 @@ iface vrf1
|
||||
|
||||
auto eno1
|
||||
iface eno1 inet manual
|
||||
mtu 1550
|
||||
|
||||
auto vmbr0
|
||||
iface vmbr0 inet static
|
||||
@ -1347,6 +1367,7 @@ iface vrf1
|
||||
|
||||
auto eno1
|
||||
iface eno1 inet manual
|
||||
mtu 1550
|
||||
|
||||
auto vmbr0
|
||||
iface vmbr0 inet static
|
||||
@ -1465,6 +1486,7 @@ iface vrf1
|
||||
|
||||
auto eno1
|
||||
iface eno1 inet manual
|
||||
mtu 1550
|
||||
|
||||
auto vmbr0
|
||||
iface vmbr0 inet static
|
||||
@ -1479,6 +1501,7 @@ iface eno2
|
||||
address 172.16.0.1
|
||||
netmask 255.255.255.0
|
||||
vrf vrf1
|
||||
mtu 1550
|
||||
post-up ip route add default via 172.16.0.254 dev eno2 vrf vrf1
|
||||
#if you have multiple external routers, you can use ecmp balancing
|
||||
#post-up route add default nexthop via 172.16.0.253 dev eno2 vrf vrf1 nexthop via 172.16.0.254 dev eno2 vrf vrf1
|
||||
@ -1584,6 +1607,7 @@ iface vrf1
|
||||
|
||||
auto eno1
|
||||
iface eno1 inet manual
|
||||
mtu 1550
|
||||
|
||||
auto vmbr0
|
||||
iface vmbr0 inet static
|
||||
@ -1598,6 +1622,7 @@ iface eno2
|
||||
address 172.16.0.3
|
||||
netmask 255.255.255.0
|
||||
vrf vrf1
|
||||
mtu 1550
|
||||
post-up ip route add default via 172.16.0.254 dev eno2 vrf vrf1
|
||||
#if you have multiple external routers, you can use ecmp balancing
|
||||
#post-up route add default nexthop via 172.16.0.253 dev eno2 vrf vrf1 nexthop via 172.16.0.254 dev eno2 vrf vrf1
|
||||
@ -1704,7 +1729,8 @@ iface vrf1
|
||||
|
||||
auto eno1
|
||||
iface eno1 inet manual
|
||||
|
||||
mtu 1550
|
||||
|
||||
auto vmbr0
|
||||
iface vmbr0 inet static
|
||||
address 192.168.0.3
|
||||
@ -1718,6 +1744,7 @@ iface eno2
|
||||
address 172.16.0.3
|
||||
netmask 255.255.255.0
|
||||
vrf vrf1
|
||||
mtu 1550
|
||||
post-up ip route add default via 172.16.0.254 dev eno2 vrf vrf1
|
||||
#if you have multiple external routers, you can use ecmp balancing
|
||||
#post-up route add default nexthop via 172.16.0.253 dev eno2 vrf vrf1 nexthop via 172.16.0.254 dev eno2 vrf vrf1
|
||||
@ -1832,6 +1859,7 @@ iface eno2
|
||||
address 172.16.0.1
|
||||
netmask 255.255.255.0
|
||||
vrf vrf1
|
||||
mtu 1550
|
||||
post-up ip route add default via 172.16.0.254 dev eno2 vrf vrf1
|
||||
vrrp-id 1
|
||||
vrrp-priority 1
|
||||
@ -1845,6 +1873,7 @@ auto eno2
|
||||
iface eno2
|
||||
address 172.16.0.2
|
||||
netmask 255.255.255.0
|
||||
mtu 1550
|
||||
vrf vrf1
|
||||
post-up ip route add default via 172.16.0.254 dev eno2 vrf vrf1
|
||||
vrrp-id 1
|
||||
|
||||
Loading…
Reference in New Issue
Block a user