Re: DHCPd - option capwap (code 138)
Update.
My conf seems to work as expected, but it took a few hours for APs to find the
controller. Since then even new APs find the controlles in a few minutes.
Controller: Alcatel-Lucent OmniVista 2500
APs: OAW-AP1321-RW
Thanks for your help!
On Mon, 10 May 2021 15:30:01 +0200
Radek wrote:
> Thank you Denis,Stu,
>
> I added option-138, the syntax is correct now but the AP doesn't connect to
> the Controller.
> Did I missed any other option(s) in my dhcpd.conf or should I look for the
> reason at the Controller side?
>
> subnet 10.109.3.0 netmask 255.255.255.0 {
> option routers 10.109.3.254;
> range 10.109.3.201 10.109.3.220;
> #option option-138 10.109.3.100;
> option option-138 A:6D:3:64;
>
> host [...]
>
> On Thu, 6 May 2021 11:45:43 +0200
> Denis Fondras wrote:
>
> > Le Thu, May 06, 2021 at 10:48:55AM +0200, Radek a écrit :
> > > Hello,
> > > I want to use dhcpd server to push Wireless Controller's IP address to
> > > the APs.
> > >
> > > According to this:
> > > http://systemnetworksecurity.blogspot.com/2013/02/adding-custom-options-in-isc-dhcpds.html
> > > https://www.secuvera.de/blog/capwap-dhcp-option-138-auf-isc-dhcpd-server-einrichten/
> > > I need to add *option capwap* to /etc/dhcpd.conf
> > >
> > > option capwap code 138 = ip-address; #Custom Option capwap
> > > option capwap 192.168.1.110; #WLAN-Controller-IP
> > >
> >
> > Have you tried something like :
> >
> > option option-138 C0:A8:01:6E;
> >
> > ?
> >
>
>
> --
> Radek
>
--
Radek
Re: DHCPd - option capwap (code 138)
Thank you Denis,Stu,
I added option-138, the syntax is correct now but the AP doesn't connect to the
Controller.
Did I missed any other option(s) in my dhcpd.conf or should I look for the
reason at the Controller side?
subnet 10.109.3.0 netmask 255.255.255.0 {
option routers 10.109.3.254;
range 10.109.3.201 10.109.3.220;
#option option-138 10.109.3.100;
option option-138 A:6D:3:64;
host [...]
On Thu, 6 May 2021 11:45:43 +0200
Denis Fondras wrote:
> Le Thu, May 06, 2021 at 10:48:55AM +0200, Radek a écrit :
> > Hello,
> > I want to use dhcpd server to push Wireless Controller's IP address to the
> > APs.
> >
> > According to this:
> > http://systemnetworksecurity.blogspot.com/2013/02/adding-custom-options-in-isc-dhcpds.html
> > https://www.secuvera.de/blog/capwap-dhcp-option-138-auf-isc-dhcpd-server-einrichten/
> > I need to add *option capwap* to /etc/dhcpd.conf
> >
> > option capwap code 138 = ip-address; #Custom Option capwap
> > option capwap 192.168.1.110; #WLAN-Controller-IP
> >
>
> Have you tried something like :
>
> option option-138 C0:A8:01:6E;
>
> ?
>
--
Radek
Re: DHCPd - option capwap (code 138)
On 2021-05-06, Radek wrote:
> Hello,
> I want to use dhcpd server to push Wireless Controller's IP address to the
> APs.
>
> According to this:
> http://systemnetworksecurity.blogspot.com/2013/02/adding-custom-options-in-isc-dhcpds.html
> https://www.secuvera.de/blog/capwap-dhcp-option-138-auf-isc-dhcpd-server-einrichten/
> I need to add *option capwap* to /etc/dhcpd.conf
>
> option capwap code 138 = ip-address; #Custom Option capwap
> option capwap 192.168.1.110; #WLAN-Controller-IP
>
> I can't find the capwap option in dhcp-options(5) i OpenBSD.
> How can I do what I need using other options/configuration?
> Thanks!
It's a proper RFC protocol so we could add it to dhcpd. Possible
diff below, maybe it should be moved to the named part of
dhcp_option_default_priority too but there are other named options
which aren't listed so I've left that out for now.
CAPWAP is RFC5415, the DHCP option is defined in RFC5417.
Index: dhcp-options.5
===
RCS file: /cvs/src/usr.sbin/dhcpd/dhcp-options.5,v
retrieving revision 1.31
diff -u -p -r1.31 dhcp-options.5
--- dhcp-options.5 8 May 2019 22:00:55 - 1.31
+++ dhcp-options.5 7 May 2021 08:38:48 -
@@ -169,6 +169,13 @@ Some DHCP clients will support it, and o
This option specifies the broadcast address in use on the client's subnet.
Legal values for broadcast addresses are specified in section 3.2.1.3 of
RFC 1122.
+.It Ic option capwap-ac Ar ip-address Oo , Ar ip-address ... Oc ;
+The
+.Ic capwap-ac
+option specifies a list of IP addresses of Wireless Access Controllers.
+These are used by Wireless Termination Points using the Control And
+Provisioning of Wireless Access Points (CAPWAP) protocol, RFC 5415.
+Addresses should be listed in order of preference.
.It Ic option classless-static-routes Ar cidr ip-address Oo , Ar cidr
ip-address ... Oc ;
This option specifies a list of destination networks and the
associated gateways.
Index: dhcp.h
===
RCS file: /cvs/src/usr.sbin/dhcpd/dhcp.h,v
retrieving revision 1.11
diff -u -p -r1.11 dhcp.h
--- dhcp.h 8 May 2019 22:00:55 - 1.11
+++ dhcp.h 7 May 2021 08:38:48 -
@@ -173,6 +173,7 @@ struct dhcp_packet {
#define DHO_NDS_CONTEXT87
#define DHO_DOMAIN_SEARCH 119
#define DHO_CLASSLESS_STATIC_ROUTES121
+#define DHO_CAPWAP_AC 138
#define DHO_TFTP_CONFIG_FILE 144
#define DHO_VOIP_CONFIGURATION_SERVER 150
#define DHO_CLASSLESS_MS_STATIC_ROUTES 249
Index: tables.c
===
RCS file: /cvs/src/usr.sbin/dhcpd/tables.c,v
retrieving revision 1.14
diff -u -p -r1.14 tables.c
--- tables.c8 May 2019 22:00:55 - 1.14
+++ tables.c7 May 2021 08:38:48 -
@@ -214,7 +214,7 @@ struct option dhcp_options[256] = {
{ "option-135", "X",_universe, 135 },
{ "option-136", "X",_universe, 136 },
{ "option-137", "X",_universe, 137 },
- { "option-138", "X",_universe, 138 },
+ { "capwap-ac", "lA",_universe, 138 },
{ "option-139", "X",_universe, 139 },
{ "option-140", "X",_universe, 140 },
{ "option-141", "X",_universe, 141 },
@@ -404,6 +404,8 @@ unsigned char dhcp_option_default_priori
DHO_NETBIOS_SCOPE,
DHO_FONT_SERVERS,
DHO_X_DISPLAY_MANAGER,
+ DHO_CAPWAP_AC,
+ DHO_VOIP_CONFIGURATION_SERVER,
DHO_DHCP_PARAMETER_REQUEST_LIST,
DHO_DHCP_USER_CLASS_ID,
DHO_RELAY_AGENT_INFORMATION,/* Should be the last option. */
@@ -417,9 +419,9 @@ unsigned char dhcp_option_default_priori
100, 101, 102, 103, 104, 105, 106, 107, 108, 109,
110, 111, 112, 113, 114, 115, 116, 117, 118,
120, 122, 123, 124, 125, 126, 127, 128, 129,
- 130, 131, 132, 133, 134, 135, 136, 137, 138, 139,
+ 130, 131, 132, 133, 134, 135, 136, 137, 139,
140, 141, 142, 143, 144, 145, 146, 147, 148, 149,
- 150, 151, 152, 153, 154, 155, 156, 157, 158, 159,
+151, 152, 153, 154, 155, 156, 157, 158, 159,
160, 161, 162, 163, 164, 165, 166, 167, 168, 169,
170, 171, 172, 173, 174, 175, 176, 177, 178, 179,
180, 181, 182, 183, 184, 185, 186, 187, 188, 189,
Re: DHCPd - option capwap (code 138)
Le Thu, May 06, 2021 at 10:48:55AM +0200, Radek a écrit : > Hello, > I want to use dhcpd server to push Wireless Controller's IP address to the > APs. > > According to this: > http://systemnetworksecurity.blogspot.com/2013/02/adding-custom-options-in-isc-dhcpds.html > https://www.secuvera.de/blog/capwap-dhcp-option-138-auf-isc-dhcpd-server-einrichten/ > I need to add *option capwap* to /etc/dhcpd.conf > > option capwap code 138 = ip-address; #Custom Option capwap > option capwap 192.168.1.110; #WLAN-Controller-IP > Have you tried something like : option option-138 C0:A8:01:6E; ?
DHCPd - option capwap (code 138)
Hello, I want to use dhcpd server to push Wireless Controller's IP address to the APs. According to this: http://systemnetworksecurity.blogspot.com/2013/02/adding-custom-options-in-isc-dhcpds.html https://www.secuvera.de/blog/capwap-dhcp-option-138-auf-isc-dhcpd-server-einrichten/ I need to add *option capwap* to /etc/dhcpd.conf option capwap code 138 = ip-address; #Custom Option capwap option capwap 192.168.1.110; #WLAN-Controller-IP I can't find the capwap option in dhcp-options(5) i OpenBSD. How can I do what I need using other options/configuration? Thanks! -- Radek
