Re: [vpp-dev] VxLAN set MTU
Thanks guys!
I've prepared a patch just to restore the previous functionality for
several interfaces: https://gerrit.fd.io/r/c/vpp/+/35362
Please take a look, if you have a chance
чт, 17 февр. 2022 г. в 22:23, Damjan Marion :
>
>
> vxlan code is missing max_frame_size callback which is now mandatory if
> you want to be able to do the change.
> If vxlan code doesn’t care about that change, it can be as simple as:
>
> vxlan_set_max_frame_size (vnet_main_t *vnm, vnet_hw_interface_t *hw, u32
> frame_size)
> {
> return 0;
> }
>
> and:
>
> eir.cb.set_max_frame_size = vxlan_set_max_frame_size;
>
> right before call to vnet_eth_register_interface (vnm, );
>
> However right solution will be to allow/disallow change based on
> underlying MTU…..
>
> —
> Damjan
>
>
>
> > On 17.02.2022., at 12:11, Pim van Pelt wrote:
> >
> > Hoi Artyom,
> >
> > Not an authoritative answer, although perhaps Damjan can confirm:
> > Is the semantic difference between max frame size (==device will reject
> frames larger than that on Rx, and never Tx frames larger than that) and
> mtu (L3 IP/IP6/MPLS packets will not be larger than that) with an
> implication that MTU can bever be larger than max_frame_size.
> >
> > Regardless, Artyom, here's how I manipulate the MTU of VXLAN tunnels -
> the trick is to use the 'mtu packet' rather than 'mtu' option (see the CLI
> call in bold):
> >
> > create vxlan tunnel instance 10 src $A dst $B vni 320501 decap-next l2
> > set interface state vxlan_tunnel10 up
> > set interface mtu packet 1522 vxlan_tunnel10
> > set interface l2 xconnect TenGigabitEthernet5/0/0.50 vxlan_tunnel10
> > set interface l2 xconnect vxlan_tunnel10 TenGigabitEthernet5/0/0.50
> >
> > pim@ddln1:~$ vppctl show ver
> > vpp v22.06-rc0~93-g360aee3e0 built by pim on dellr610 at
> 2022-02-13T11:56:07
> >
> > pim@ddln1:~$ vppctl show int vxlan_tunnel10
> > Name IdxState MTU (L3/IP4/IP6/MPLS)
> Counter Count
> > vxlan_tunnel1017 up 1522/0/0/0 rx
> packets209408
> > rx
> bytes81834552
> > tx
> packets 1616124
> > tx
> bytes 2471872228
> >
> > Does that help for you? I actually noticed that it doesn't prevent
> vxlan_tunnel10 from emitting larger frames, so I'm not quite sure what
> benefit it brings.
> >
> > On Thu, Feb 17, 2022 at 11:38 AM Artyom Glazychev <
> artyom.glazyc...@xored.com> wrote:
> > Hello,
> >
> > There is a problem with setting MTU for VxLAN. I see, that there was a
> change related to MTU and Max_frame_size -
> https://gerrit.fd.io/r/c/vpp/+/34928
> >
> > I don't know, what VxLAN configuration is right (I've asked about it
> here
> https://lists.fd.io/g/vpp-dev/topic/vxlan_l3_mode/89205942?p=,,,20,0,0,0::recentpostdate/sticky,,,20,2,0,89205942,previd=1645090589967474984,nextid=1643993575016104745=1645090589967474984=1643993575016104745
> )
> >
> > But neither this:
> > DBGvpp# create vxlan tunnel src 10.0.3.1 dst 10.0.3.3 vni 55 l3
> > vxlan_tunnel0
> > DBGvpp# set interface mtu 1400 vxlan_tunnel0
> > set interface mtu: Unsupported (underlying driver doesn't support
> changing Max Frame Size)
> >
> > Nor this:
> > DBGvpp# create vxlan tunnel src 10.0.3.1 dst 10.0.3.3 vni 55
> > vxlan_tunnel0
> > DBGvpp# set interface mtu 1400 vxlan_tunnel0
> > set interface mtu: not supported
> > is not working.
> >
> > So, my final question is how to configure the VxLAN L2-tunnel and set
> MTU?
> > Thank you.
> >
> >
> >
> >
> >
> >
> > --
> > Pim van Pelt
> > PBVP1-RIPE - http://www.ipng.nl/
> >
> >
> >
>
>
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Re: [vpp-dev] VxLAN set MTU
vxlan code is missing max_frame_size callback which is now mandatory if you
want to be able to do the change.
If vxlan code doesn’t care about that change, it can be as simple as:
vxlan_set_max_frame_size (vnet_main_t *vnm, vnet_hw_interface_t *hw, u32
frame_size)
{
return 0;
}
and:
eir.cb.set_max_frame_size = vxlan_set_max_frame_size;
right before call to vnet_eth_register_interface (vnm, );
However right solution will be to allow/disallow change based on underlying
MTU…..
—
Damjan
> On 17.02.2022., at 12:11, Pim van Pelt wrote:
>
> Hoi Artyom,
>
> Not an authoritative answer, although perhaps Damjan can confirm:
> Is the semantic difference between max frame size (==device will reject
> frames larger than that on Rx, and never Tx frames larger than that) and mtu
> (L3 IP/IP6/MPLS packets will not be larger than that) with an implication
> that MTU can bever be larger than max_frame_size.
>
> Regardless, Artyom, here's how I manipulate the MTU of VXLAN tunnels - the
> trick is to use the 'mtu packet' rather than 'mtu' option (see the CLI call
> in bold):
>
> create vxlan tunnel instance 10 src $A dst $B vni 320501 decap-next l2
> set interface state vxlan_tunnel10 up
> set interface mtu packet 1522 vxlan_tunnel10
> set interface l2 xconnect TenGigabitEthernet5/0/0.50 vxlan_tunnel10
> set interface l2 xconnect vxlan_tunnel10 TenGigabitEthernet5/0/0.50
>
> pim@ddln1:~$ vppctl show ver
> vpp v22.06-rc0~93-g360aee3e0 built by pim on dellr610 at 2022-02-13T11:56:07
>
> pim@ddln1:~$ vppctl show int vxlan_tunnel10
> Name IdxState MTU (L3/IP4/IP6/MPLS)
> Counter Count
> vxlan_tunnel1017 up 1522/0/0/0 rx
> packets209408
> rx bytes
> 81834552
> tx
> packets 1616124
> tx bytes
> 2471872228
>
> Does that help for you? I actually noticed that it doesn't prevent
> vxlan_tunnel10 from emitting larger frames, so I'm not quite sure what
> benefit it brings.
>
> On Thu, Feb 17, 2022 at 11:38 AM Artyom Glazychev
> wrote:
> Hello,
>
> There is a problem with setting MTU for VxLAN. I see, that there was a change
> related to MTU and Max_frame_size - https://gerrit.fd.io/r/c/vpp/+/34928
>
> I don't know, what VxLAN configuration is right (I've asked about it here
> https://lists.fd.io/g/vpp-dev/topic/vxlan_l3_mode/89205942?p=,,,20,0,0,0::recentpostdate/sticky,,,20,2,0,89205942,previd=1645090589967474984,nextid=1643993575016104745=1645090589967474984=1643993575016104745)
>
> But neither this:
> DBGvpp# create vxlan tunnel src 10.0.3.1 dst 10.0.3.3 vni 55 l3
> vxlan_tunnel0
> DBGvpp# set interface mtu 1400 vxlan_tunnel0
> set interface mtu: Unsupported (underlying driver doesn't support changing
> Max Frame Size)
>
> Nor this:
> DBGvpp# create vxlan tunnel src 10.0.3.1 dst 10.0.3.3 vni 55
> vxlan_tunnel0
> DBGvpp# set interface mtu 1400 vxlan_tunnel0
> set interface mtu: not supported
> is not working.
>
> So, my final question is how to configure the VxLAN L2-tunnel and set MTU?
> Thank you.
>
>
>
>
>
>
> --
> Pim van Pelt
> PBVP1-RIPE - http://www.ipng.nl/
>
>
>
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Re: [vpp-dev] VxLAN set MTU
Hoi Artyom, Not an authoritative answer, although perhaps Damjan can confirm: Is the semantic difference between max frame size (==device will reject frames larger than that on Rx, and never Tx frames larger than that) and mtu (L3 IP/IP6/MPLS packets will not be larger than that) with an implication that MTU can bever be larger than max_frame_size. Regardless, Artyom, here's how I manipulate the MTU of VXLAN tunnels - the trick is to use the 'mtu packet' rather than 'mtu' option (see the CLI call in bold): create vxlan tunnel instance 10 src $A dst $B vni 320501 decap-next l2 set interface state vxlan_tunnel10 up *set interface mtu packet 1522 vxlan_tunnel10*set interface l2 xconnect TenGigabitEthernet5/0/0.50 vxlan_tunnel10 set interface l2 xconnect vxlan_tunnel10 TenGigabitEthernet5/0/0.50 pim@ddln1:~$ vppctl show ver vpp v22.06-rc0~93-g360aee3e0 built by pim on dellr610 at 2022-02-13T11:56:07 pim@ddln1:~$ vppctl show int vxlan_tunnel10 Name IdxState MTU (L3/IP4/IP6/MPLS) Counter Count vxlan_tunnel1017 up *1522/0/0/0* rx packets209408 rx bytes81834552 tx packets 1616124 tx bytes 2471872228 Does that help for you? I actually noticed that it doesn't prevent vxlan_tunnel10 from emitting larger frames, so I'm not quite sure what benefit it brings. On Thu, Feb 17, 2022 at 11:38 AM Artyom Glazychev < artyom.glazyc...@xored.com> wrote: > Hello, > > There is a problem with setting MTU for VxLAN. I see, that there was a > change related to MTU and Max_frame_size - > https://gerrit.fd.io/r/c/vpp/+/34928 > > I don't know, what VxLAN configuration is right (I've asked about it here > https://lists.fd.io/g/vpp-dev/topic/vxlan_l3_mode/89205942?p=,,,20,0,0,0::recentpostdate/sticky,,,20,2,0,89205942,previd=1645090589967474984,nextid=1643993575016104745=1645090589967474984=1643993575016104745 > ) > > But neither this: > DBGvpp# create vxlan tunnel src 10.0.3.1 dst 10.0.3.3 vni 55 l3 > vxlan_tunnel0 > DBGvpp# set interface mtu 1400 vxlan_tunnel0 > set interface mtu: Unsupported (underlying driver doesn't support changing > Max Frame Size) > > Nor this: > DBGvpp# create vxlan tunnel src 10.0.3.1 dst 10.0.3.3 vni 55 > vxlan_tunnel0 > DBGvpp# set interface mtu 1400 vxlan_tunnel0 > set interface mtu: not supported > is not working. > > So, my final question is how to configure the VxLAN L2-tunnel and set MTU? > Thank you. > > > > > -- Pim van Pelt PBVP1-RIPE - http://www.ipng.nl/ -=-=-=-=-=-=-=-=-=-=-=- Links: You receive all messages sent to this group. View/Reply Online (#20876): https://lists.fd.io/g/vpp-dev/message/20876 Mute This Topic: https://lists.fd.io/mt/89206535/21656 Group Owner: vpp-dev+ow...@lists.fd.io Unsubscribe: https://lists.fd.io/g/vpp-dev/unsub [arch...@mail-archive.com] -=-=-=-=-=-=-=-=-=-=-=-
[vpp-dev] VxLAN set MTU
Hello, There is a problem with setting MTU for VxLAN. I see, that there was a change related to MTU and Max_frame_size - https://gerrit.fd.io/r/c/vpp/+/34928 I don't know, what VxLAN configuration is right (I've asked about it here https://lists.fd.io/g/vpp-dev/topic/vxlan_l3_mode/89205942?p=,,,20,0,0,0::recentpostdate/sticky,,,20,2,0,89205942,previd=1645090589967474984,nextid=1643993575016104745=1645090589967474984=1643993575016104745 ) But neither this: DBGvpp# create vxlan tunnel src 10.0.3.1 dst 10.0.3.3 vni 55 l3 vxlan_tunnel0 DBGvpp# set interface mtu 1400 vxlan_tunnel0 set interface mtu: Unsupported (underlying driver doesn't support changing Max Frame Size) Nor this: DBGvpp# create vxlan tunnel src 10.0.3.1 dst 10.0.3.3 vni 55 vxlan_tunnel0 DBGvpp# set interface mtu 1400 vxlan_tunnel0 set interface mtu: not supported is not working. So, my final question is how to configure the VxLAN L2-tunnel and set MTU? Thank you. -=-=-=-=-=-=-=-=-=-=-=- Links: You receive all messages sent to this group. View/Reply Online (#20874): https://lists.fd.io/g/vpp-dev/message/20874 Mute This Topic: https://lists.fd.io/mt/89206535/21656 Group Owner: vpp-dev+ow...@lists.fd.io Unsubscribe: https://lists.fd.io/g/vpp-dev/unsub [arch...@mail-archive.com] -=-=-=-=-=-=-=-=-=-=-=-
