On Thu, January 30, 2014 15:45, Jesse Gross wrote:
>> A particular detail: on which host (i.e, non-VM) interfaces does one
>> change the MTU for OpenStack? For example, on OS compute nodes, there is
>> the actual NIC (eth0), but also br-int and br-tun (where the GRE tunnels
>> connect to):
>
> You should change the MTU on all interfaces: the Ethernet interface is
> a must and bridges should have the same MTU on all ports.
So that includes all of these br-*?
root@osnet1:/# ifconfig
br-ex Link encap:Ethernet HWaddr aa:bb:0b:bc:09:cd
inet addr:10.0.20.77 Bcast:10.0.20.255 Mask:255.255.255.0
UP BROADCAST RUNNING MTU:1546 Metric:1
br-int Link encap:Ethernet HWaddr 32:95:87:9b:2b:49
UP BROADCAST RUNNING MTU:1500 Metric:1
br-tun Link encap:Ethernet HWaddr ae:ab:60:d2:75:4c
UP BROADCAST RUNNING MTU:1546 Metric:1
eth0 Link encap:Ethernet HWaddr aa:bb:0b:bc:09:cd
UP BROADCAST RUNNING MULTICAST MTU:1546 Metric:1
As well as on the compute nodes?
dmagda@oscn1:~$ ifconfig
br-int Link encap:Ethernet HWaddr 42:36:74:c4:a4:40
UP BROADCAST RUNNING MTU:1500 Metric:1
br-tun Link encap:Ethernet HWaddr 2e:d6:b1:bb:c5:40
UP BROADCAST RUNNING MTU:1546 Metric:1
eth0 Link encap:Ethernet HWaddr aa:bb:7d:63:55:aa
inet addr:10.0.20.76 Bcast:10.0.20.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1546 Metric:1
Regards,
David
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