From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received-SPF: None (no SPF record) identity=mailfrom; client-ip=203.199.198.232; helo=imsva.in.megatrends.com; envelope-from=karunakarp@amiindia.co.in; receiver=edk2-devel@lists.01.org Received: from IMSVA.IN.MEGATRENDS.COM (Webmail.amiindia.co.in [203.199.198.232]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ml01.01.org (Postfix) with ESMTPS id 69B8421F322CB for ; Wed, 27 Sep 2017 02:33:02 -0700 (PDT) Received: from IMSVA.IN.MEGATRENDS.COM (IMSVA.IN.MEGATRENDS.COM [127.0.0.1]) by IMSVA (Postfix) with ESMTP id C73078204A; Wed, 27 Sep 2017 15:08:57 +0530 (IST) Received: from IMSVA.IN.MEGATRENDS.COM (IMSVA.IN.MEGATRENDS.COM [127.0.0.1]) by IMSVA (Postfix) with ESMTP id A659082047; Wed, 27 Sep 2017 15:08:57 +0530 (IST) Received: from webmail.amiindia.co.in (venus2.in.megatrends.com [10.0.0.7]) by IMSVA.IN.MEGATRENDS.COM (Postfix) with ESMTPS; Wed, 27 Sep 2017 15:08:57 +0530 (IST) Received: from VENUS1.in.megatrends.com ([fe80::951:7975:6ecf:eae5]) by Venus2.in.megatrends.com ([fe80::2002:4a07:4f17:c09b%14]) with mapi id 14.03.0248.002; Wed, 27 Sep 2017 15:06:10 +0530 From: Karunakar P To: "'Fu, Siyuan'" , "'edk2-devel@lists.01.org'" CC: "Wu, Jiaxin" , "Ye, Ting" Thread-Topic: Linux CentOS 7.3 can get DHCP IPv4 IP address with configuring DHCP server as per RFC3021 Thread-Index: AQHTNdQYEwAPyyWDikKXk6PJMke3l6LFSg+AgAK/qgCAAHIOEA== Date: Wed, 27 Sep 2017 09:36:10 +0000 Message-ID: References: In-Reply-To: Accept-Language: en-GB, en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.0.84.128] MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-TM-AS-Product-Ver: IMSVA-9.1.0.1600-8.1.0.1062-23354.005 X-TM-AS-Result: No--16.890-5.0-31-10 X-imss-scan-details: No--16.890-5.0-31-10 X-TMASE-Version: IMSVA-9.1.0.1600-8.1.1062-23354.005 X-TMASE-Result: 10--16.889800-10.000000 X-TMASE-MatchedRID: 1ZHks2aQIkg6yy6RAAEPc7iMC5wdwKqd9pLnYtQ99xKgOUc+PAfSO/vt 4ENurW24XvTfF9EoV2C3ZwjZK1AJzQTczh5rbZDwkxIExNA2JIAppGYMKZezN8i9AjK6C8p150V TVXHWnpkoNWlSuf46hPsMLDtJ/qknQdZuZ42vrpHcWo5Vvs8MQpZ6zKu0q4rt4qHfv6n91zaPIg xPIg2DKJvD3l972b4g9cawxA8EE9P2lJkH6sDo41VN8laWo90M5TbwqVVpF+NkljqvtoNIdswmj QloGI083SakDUqFzYxZfqyYzy7LgSAqG/HTQfXBFyqkfsPWu1BKlo6qIxfTgP8BLjOjzDw1TNxZ H+hZvXkPJYzMKyz+gF+TuUKAc6C1XBtzGjIuBpl8qY334HYDDyH8kDR0dp2mdDwP5ItpCOwcSRF 9JP5Ozi4jb1n1eNA354mbosKUuYfCKxdd3mKUa4oLoibgjVEX+Gz435tISEHimKcLRvsB1fBYRo 06eVj38vzD3/0Zl0qFbYEMj70WzDScgMqgJnG/e5NWR5iixe25pw2tsxj4tLXvDHySC+eUTxE5R pfriHSQhHmNCS57VOXbZzu8Xg2bfbBn31Ku2wzLtNJZxvPj1jGaUEu3RNHWgnL+Z5JyhjWFAf5i ylR8Wnb4Bm7FqQnLXHn0K2CbIexZxuGjBHE9051U1lojafr/yiBjGmb09Nu0H0i032VIvEG/R/S eKCMZEv0kmovGJccUAF4uBmvRkR8TzIzimOwP/sToY2qzpx4BpRCTkRk5SUUYJ3RLQ0KyIRMdFY rhTS0ve29OYg7xtECdgiYQQfco/z9AgpdC1VPFhXMjdQIJpg== X-TMASE-SNAP-Result: 1.821001.0001-0-1-12:0,22:0,33:0,34:0,39:0-0 X-Content-Filtered-By: Mailman/MimeDel 2.1.22 Subject: Re: Linux CentOS 7.3 can get DHCP IPv4 IP address with configuring DHCP server as per RFC3021 X-BeenThere: edk2-devel@lists.01.org X-Mailman-Version: 2.1.22 Precedence: list List-Id: EDK II Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 27 Sep 2017 09:33:03 -0000 Content-Language: en-US Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Hi Siyuan, I've filled a New Bug in Bugzilla and following are the details. https://bugzilla.tianocore.org/show_bug.cgi?id=3D722 Thanks, Karunakar From: Fu, Siyuan [mailto:siyuan.fu@intel.com] Sent: Wednesday, September 27, 2017 1:46 PM To: Karunakar P; 'edk2-devel@lists.01.org' Cc: Wu, Jiaxin; Ye, Ting Subject: RE: Linux CentOS 7.3 can get DHCP IPv4 IP address with configuring= DHCP server as per RFC3021 Hi, Karunakar We haven't received requirement for this feature before so we don't have pl= an now. I think you can submit a Bugzilla ticket for this feature request, = we will follow up to investigate it. BestRegards Fu Siyuan From: Karunakar P [mailto:karunakarp@amiindia.co.in] Sent: Monday, September 25, 2017 4:54 PM To: Fu, Siyuan >; 'edk2-dev= el@lists.01.org' > Cc: Wu, Jiaxin >; Ye, Ting = > Subject: RE: Linux CentOS 7.3 can get DHCP IPv4 IP address with configuring= DHCP server as per RFC3021 Hi Fu Siyuan, Thanks for your conformation. We would like to use /31s to save IPv4 addresses. When it's a point-to-point link (server to router), the extra network addre= ss and broadcast address is wasted. RFC 3021 solves the problem by using a broadcast address of 255.255.255.255= on such subnets. We have a requirement to support this, do you have any plan to support RFC3= 021 ? Given the requirement time consuming how hard to implement this ? Thanks, karunakar From: Fu, Siyuan [mailto:siyuan.fu@intel.com] Sent: Monday, September 25, 2017 1:28 PM To: Karunakar P; 'edk2-devel@lists.01.org' Cc: Wu, Jiaxin; Ye, Ting Subject: RE: Linux CentOS 7.3 can get DHCP IPv4 IP address with configuring= DHCP server as per RFC3021 Hi, Karunakar May I know that whether you have a real requirement that must use the point= -2-point link in your environment, or you just found this problem in your t= est? BestRegards Fu Siyuan From: Fu, Siyuan Sent: Monday, September 25, 2017 3:50 PM To: Karunakar P >; 'edk2-devel@lists.01.org' > Cc: Wu, Jiaxin >; Ye, Ting = > Subject: RE: Linux CentOS 7.3 can get DHCP IPv4 IP address with configuring= DHCP server as per RFC3021 Hi, Karunakar You are correct that EDK2 doesn't support rfc3201. The most obvious problem that come to my mind is the NetIp4IsUnicast() func= tion in NetLib, which has the assumption that the host address part should = not be all zero or all one (or to say, -1 in the rfc3201). I think that's w= hy the PXE failed, but Cent OS could use IP address from the same DHCP serv= er. This is just an example, there may be some other places in edk2 network sta= ck which have the same assumption, I'm not sure about this. Anyway, we neve= r considered the point-2-point link in edk2. BestRegards Fu Siyuan From: Karunakar P [mailto:karunakarp@amiindia.co.in] Sent: Monday, September 25, 2017 3:02 PM To: 'edk2-devel@lists.01.org' > Cc: Wu, Jiaxin >; Fu, Siyua= n >; Ye, Ting > Subject: Re: Linux CentOS 7.3 can get DHCP IPv4 IP address with configuring= DHCP server as per RFC3021 Hello All, It is known that current EDKII doesn't support RFC3021, We could see the fo= llowing behavior which is PXE boot fails whereas Cent OS can get IP address= from the same BIOS. [Configuration Used] DHCP server setting under Ubuntu: 1. /etc/dhcp/dhcpd.conf # RFC3021-Using 31-bit perfixes on IPv4 Point-to-Point Links subnet 192.168.1.0 netmask 255.255.255.254 { range 192.168.1.1 192.168.1.1; next-server 192.168.1.0; filename "EFI/BOOT/BOOTAA64.EFI"; option subnet-mask 255.255.255.254; option routers 192.168.1.0; } 2. /etc/network/interfaces auto eth0 iface eth0 inet static address 192.168.1.0 netmask 255.255.255.254 network 192.168.1.0 If the DHCP server and network interface are set up above configuration. Be= low are my test results and questions 1. CentOS 7.3 (pre-installed) was able to retrieve IP through DHCP w= hen they connect HDD to the SUT where PXE is failing. 2. Could you please suggest what could be the reason behind this? Thanks, karunakar