[802.11r][HS20] Compatibility issues

Adrian Moran adrian.moran at fon.com
Thu Jun 11 05:08:18 EDT 2015


Hi all,
I have been making some tests with 11r and also with HS 2.0. I have two APs
properly configured to both, operate with 802.11r ando to poperate with HS
2.0 capabilities. The issue comes when I try to perform a handover with 11r
using at the same time HS 2.0, I mean:

- I connect the terminal (Samsung S4) to one AP without using HS 2.0
(adding manually the EAP profile) and it roams perfectly to second AP using
11r.

- But, when I connect the terminal using HS 2.0 (profile autogeneration) it
is not able to roam from one Ap to another using 11r.

Anyone else has the same issue?

My AP configuration is:

*************************************************************
interface=wpriv
ctrl_interface=/var/run/hostapd-phy0
ap_isolate=1
disassoc_low_ack=1
preamble=1
auth_server_addr=OMITTED
auth_server_port=OMITTED
auth_server_shared_secret=OMITTED
disable_pmksa_caching=1
okc=0
acct_server_addr=OMITTED
acct_server_port=OMITTED
acct_server_shared_secret=OMITTED
nas_identifier=ap1.test.com
eapol_key_index_workaround=1
ieee8021x=1
wpa_key_mgmt=FT-EAP WPA-EAP
interworking=1
internet=1
asra=0
esr=0
uesa=0
ipaddr_type_availability=1C
access_network_type=3
venue_group=7
venue_type=1
venue_name=eng:Test
domain_name=test.com
nai_realm=0,test.com,21[2:4]
hs20=1
disable_dgaf=0
osen=0
hs20_deauth_req_timeout=0
hs20_oper_friendly_name=eng:Test
auth_algs=1
wpa=2
wpa_pairwise=CCMP
ssid=HS20_Test
bridge=br-lan
wmm_enabled=1
bssid=OMITTED
ignore_broadcast_ssid=0
mobility_domain=a1b2
r0_key_lifetime=10000
r1_key_holder=000102030405
reassociation_deadline=1000
r0kh=MAC_AP_1 ap1.test.com 010102030405060708090a0b0c0d0e0f
r0kh=MAC_AP_2 ap2.test.com 030102030405060708090a0b0c0d0e0f
r1kh=MAC_AP_2 00:01:02:03:04:06 020102030405060708090a0b0c0d0e0f
ft_over_ds=0
pmk_r1_push=1
*************************************************************





I think the problem lies on the config line below:

wpa_key_mgmt=FT-EAP WPA-EAP

Probably, the HS 2.0 profile generation selects WPA-EAP instead of FT-EAP,
but I am not sure of this.


On the other hand, Jouni points me some time ago to the 802.11ai amendment
as a mean to enhance handover experience. Is there any plan to include
support of it in hostapd in the near future?

Thanks a lot,
Adrián
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