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Today's Topics:
1. Linux DHCP sending wrong parameters in offer packet
(Gaikwad Yogesh)
----------------------------------------------------------------------
Message: 1
Date: Fri, 25 Jan 2019 12:41:50 +0000
From: Gaikwad Yogesh <yogesh.gaik...@tieto.com>
To: "dhcp-users@lists.isc.org" <dhcp-users@lists.isc.org>
Subject: Linux DHCP sending wrong parameters in offer packet
Message-ID:
<he1pr0402mb3354db3c6fce7789787f4a8e81...@he1pr0402mb3354.eurprd04.prod.outlook.com>
Content-Type: text/plain; charset="us-ascii"
Hi,
There is issue that linux DHCP is sending wrong parameters while sending offer
packet for Cisco AP's in one of our office locations.
I have taken packet captures on the DHCP server side.
As you can see in below packet capture there is DHCP DISCOVER message from
Cisco AP requesting for IP and other parameters.
Then in DHCP offer packet, it offers IP from correct subnet, but with wrong
router IP, subnet mask and broadcast address.
Basically, my observation is that it is giving wrong parameters in offer from
the topmost subnet (as linux works from top to bottom approach) that has cisco
option 43 configured. If I remove the Cisco option 43 from that subnet then it
provides parameters from next subnet which has the Cisco option 43 in it.
The correct subnet from which I am expecting that the AP should get all its
parameters is configured at the end of the DHCP conf file.
DHCP DISCOVER PACKET
[cid:image001.png@01D4B4D9.6F320900]
DHCP OFFER PACKET
[cid:image002.png@01D4B4D9.6F320900]
Best regards,
Yogesh Gaikwad, Technical Architect - TECA Network
Tieto Corporation, TSM
email yogesh.gaik...@tieto.com<mailto:yogesh.gaik...@tieto.com>, direct +91
(0)2067303120
Wing 1, Cluster D, EON Free Zone, MIDC Kharadi Knowledge Park, Pune - 411 014,
India
[Tieto_logo_for_email_signature_127x50]<http://www.tieto.com/>
Please note: The information contained in this message may be legally
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