Regarding IP address assignment

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Spencer Sevilla spencer.builds.networks at gmail.com
Thu Nov 7 20:17:17 UTC 2019


To add-on to this discussion, I do not believe that the subnet "
55.55.0.25/16" is valid. The entire point of the netmask (in this case 16)
is to denote the length of the network address in bits. A bitwise AND
operation should always provide the routing prefix, in this case 55.55.0.0.
A subnet with a non-zero value is only possible on orders of 2 and with an
appropriately long netmask, e.g. 55.55.0.128/25.

On Thu, Nov 7, 2019 at 5:04 AM Murali Sb <murali07smile at gmail.com> wrote:

> Thank you for your response.  I'll try other way.
>
> On Thu, 7 Nov, 2019, 6:23 PM 이석찬, <acetcom at gmail.com> wrote:
>
>> Hi Murali,
>>
>> Unfortunately, open5gs(nextepc) does not support the range of the ip pool.
>> As such, it is not possible at this time.
>>
>> Let me paste the related source code regarding the issue.
>>
>> Sorry for not being help this.
>>
>> Best regards,
>>    Sukchan
>>
>>
>>
>> ---------------------------------------------------------------------------------------------
>> In src/pgw/pgw-context.c, pgw_ue_pool_generate(), line 1207
>>
>>            /* Exclude Network Address */
>>             if (memcmp(ue_ip->addr, subnet->sub.sub, maxbytes) == 0)
>> continue;
>>
>>             /* Exclude Broadcast Address */
>>             if (memcmp(ue_ip->addr, broadcast, maxbytes) == 0) continue;
>>
>>             /* Exclude TUN IP Address */
>>             if (memcmp(ue_ip->addr, subnet->gw.sub, maxbytes) == 0)
>> continue;
>>
>>
>>
>>
>> On Thu, Nov 7, 2019 at 4:42 PM Murali Sb <murali07smile at gmail.com> wrote:
>>
>>> Hi
>>>
>>> In my project, I'm using IP address as 55.55.0.25/16 in nextepc.conf
>>> My tunnel inet gets 55.55.0.25 , mask is 255.255.0.0
>>>  IP address for my route from the pool is 55.55.0.1.
>>> Why is this happening?
>>>
>>> I want my route to start from 55.55.0.26 and so on...
>>>
>>> how to do this? please help
>>>
>>>
>>> --
>>> Murali.S
>>>
>>
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