OpenBSD tries to limit the amount of knob tuning, people tend to shoot
themselves in the foot when they start playing with knobs.
However you can always compile your own kernel with the information provided.
On April 19, 2023 2:12:00 AM MDT, Samuel Jayden <samueljaydan1...@gmail.com>
wrote:
>Sincerely thank you David for your answer,
>I hope you may consider committing it to src and I kindly say that it would
>be perfect if this max cache size limit value was tied to a sysctl
>parameter.
>
>David Gwynne <da...@gwynne.id.au>, 19 Nis 2023 Çar, 02:30 tarihinde şunu
>yazdı:
>
>> On Tue, Apr 18, 2023 at 07:51:08PM +0000, Samuel Jayden wrote:
>> > Hello,
>> > I have one veb interface in OpenBSD 7.2 and 5 ethernet ports are paired
>> > with this veb. As I understand from the ifconfig output, 4096 mac address
>> > cache values can be kept in this veb interface .
>> >
>> > ifconfig veb10
>> > veb10: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST>
>> > index 12 llprio 3
>> > groups: veb
>> > em3 flags=3<LEARNING,DISCOVER>
>> > port 4 ifpriority 0 ifcost 0
>> > em0 flags=3<LEARNING,DISCOVER>
>> > port 1 ifpriority 0 ifcost 0
>> > em1 flags=3<LEARNING,DISCOVER>
>> > port 2 ifpriority 0 ifcost 0
>> > ix3 flags=3<LEARNING,DISCOVER>
>> > port 8 ifpriority 0 ifcost 0
>> > ix2 flags=3<LEARNING,DISCOVER>
>> > port 7 ifpriority 0 ifcost 0
>> > Addresses (max cache: 4096, timeout: 240):
>> > 2c:f0:5d:73:f8:c4 em1 0 flags=0<>
>> > ....
>> >
>> > When I tried to extend this limit value with the command "ifconfig veb10
>> > maxaddr 4097", I got the following error message:
>> > "ifconfig: veb10: Invalid argument"
>> > The maximum value I can give without this error message is 4096. Isn't
>> this
>> > value a bit narrow?
>>
>> maybe. it seemed pretty high when i made it up.
>>
>> > I have tested that the mac addresses of the connected devices are not
>> > recorded in the veb interface after exceeding the limit.
>> >
>> > I want to switch from Cisco device to OpenBSD in a place where there are
>> > more than 8 thousand MAC addresses, but I need to exceed this max cache
>> > size value.
>> > How can I increase this max cache size value 8192 or higher value?
>>
>> you change 4096 to a bigger number in the code.
>>
>> Index: if_etherbridge.c
>> ===================================================================
>> RCS file: /cvs/src/sys/net/if_etherbridge.c,v
>> retrieving revision 1.7
>> diff -u -p -r1.7 if_etherbridge.c
>> --- if_etherbridge.c 5 Jul 2021 04:17:41 -0000 1.7
>> +++ if_etherbridge.c 19 Apr 2023 02:25:54 -0000
>> @@ -675,7 +676,7 @@ int
>> etherbridge_set_max(struct etherbridge *eb, struct ifbrparam *bparam)
>> {
>> if (bparam->ifbrp_csize < 1 ||
>> - bparam->ifbrp_csize > 4096) /* XXX */
>> + bparam->ifbrp_csize > 16384) /* XXX */
>> return (EINVAL);
>>
>> /* commit */
>>
