BIRD on physical / virtual server.

[Kees Meijs]

Hi Mike,

Saso is correct; we bumped into that one too.

However, as long as you're running BIRD in a VM and OVS is outside the
VM there's no issue.

K.

On 08-07-2020 08:58, Saso Tavcar wrote:
> Hi,
>
> There is a known issue with with Open vSwitch (OVS) performance with BGP.
> Even without OVS we hit IRQ (too many) issue on "physical" network in
> our KVM
> environment.
>
>
> Official OVS quote:
> >/We'd accept patches to improve OVS's routing table code. It's not />/designed to scale to 1,800,000 routes. We'd also take code to suppress />/the routing table code in cases where it isn't actually needed, since />/it's not always needed. But we can't take a patch to just delete it; />/I'm sure you understand./
> I tried to apply this patch at that time, but was already useless for
> newer versions:
>
> _https://mail.openvswitch.org/pipermail/ovs-discuss/attachments/20161123/5379b333/attachment.bin_
>
> Our workaround was to scale VM with 3 vCPU-s, since our average system
> load is 1.5 for BGP.
>
> You can see what is happening:
>
> [root at bgp1 ~]# top
> ...
>   PID USER      PR  NI    VIRT    RES    SHR S  %CPU  %MEM     TIME+
> COMMAND                                                               
>                                                           
> *  654 root      10 -10 1284492   1.0g  20276 R  98.0  27.0   2513:01
> ovs-vswitchd                                                          
>                                                           *
>    16 root      20   0       0      0      0 S   2.0   0.0  24:45.60
> ksoftirqd/1  
>
> [root at bgp1 ~]# ip route show
> ...
> 1.0.0.0/24 via 89.212.xx.xx dev t2-v24-ha proto bird 
> 1.0.4.0/24 via 89.212.xx.xx dev t2-v24-ha proto bird 
> 1.0.4.0/22 via 89.212.xx.xx dev t2-v24-ha proto bird 
> 1.0.5.0/24 via 89.212.xx.xx dev t2-v24-ha proto bird
>
>
> Routes being constantly added and deleted:
>
> [root at bgp1 ~]# ip monitor
> ...
> Deleted 2620:11d:6000::/42 via 2a01:xxx:xxx::1 dev t2-v26-ha proto
> bird metric 1024 pref medium
> 2620:11d:6000::/42 via 2a01:xxx:xxx::1 dev t2-v26-ha proto bird metric
> 1024 pref medium
> Deleted 2620:11d:6000::/42 via 2a01:xxx:xxx::1 dev t2-v26-ha proto
> bird metric 1024 pref medium
> 2620:11d:6000::/42 via 2a01:xxx:xxx::1 dev t2-v26-ha proto bird metric
> 1024 pref medium
> Deleted 2620:11d:6000::/42 via 2a01:xxx:xxx::1 dev t2-v26-ha proto
> bird metric 1024 pref medium
> 2620:11d:6000::/42 via 2a01:xxx:xxx::1 dev t2-v26-ha proto bird metric
> 1024 pref medium
> Deleted 68.69.37.0/24 via 89.212.xx.xx dev t2-v24-ha proto bird 
> 68.69.37.0/24 via 89.212.xx.xx dev t2-v24-ha proto bird 
> Deleted 103.115.180.0/22 via 89.212.xx.xx dev t2-v24-ha proto bird 
> 103.115.180.0/22 via 89.212.xx.xx dev t2-v24-ha proto bird 
> Deleted 103.115.180.0/22 via 89.212.xx.xx dev t2-v24-ha proto bird 
> 103.115.180.0/22 via 89.212.xx.xx dev t2-v24-ha proto bird 
> Deleted 2.16.70.0/23 via 89.212.xx.xx dev t2-v24-ha proto bird 
> Deleted 88.221.28.0/22 via 89.212.xx.xx dev t2-v24-ha proto bird 
> Deleted 23.50.188.0/22 via 89.212.xx.xx dev t2-v24-ha proto bird 
> Deleted 92.122.68.0/22 via 89.212.xx.xx dev t2-v24-ha proto bird 
> Deleted 88.221.100.0/22 via 89.212.xx.xx dev t2-v24-ha proto bird 
> Deleted 92.123.208.0/22 via 89.212.xx.xx dev t2-v24-ha proto bird
> ..... 
>
>
>
> Regards,
> saso
>
>> On 8 Jul 2020, at 08:05, Mike Neo <neomikemac at gmail.com
>> <mailto:neomikemac at gmail.com>> wrote:
>>
>> Hi,
>>
>> what is your experience with installing bird on virtual
>> server (ESXi)? Is there any limitation of this kind of deployment for
>> example problems with performance etc.?
>>
>> Regards,
>> Mike
>

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://trubka.network.cz/pipermail/bird-users/attachments/20200708/4fea4eec/attachment.htm>