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srijit92
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How to solve too many pole timeouts in SXT AC P2P link?

Fri Jul 07, 2017 6:17 am

Hi,

There is a point to point link with SXT AC on both ends. Distance is around 1200 meters and height at both end is 65 ft. Link was running fine for around 350 days (real uptime). But from last 10 days I'm totally frustrated with the link condition. No changes are made to the P2P link after first commissioning.
There is huge ping loss from AP to CPE frequently. In AP Log it shows - disconnected , too many pole timeouts. In CPE it shows - lost connection, extensive data loss. Also another strange thing observed was that during first link commissioning, the difference between Chain 0 & Chain 1 signal level was 3/4 db but now I noticed its exactly 10/10 db. Like C0 = 59/59 and C1 = 69/69.

I have done the following changes at AP end to check if problem resolves but no luck-
# Changed frequency
# Changed protocol from nv2 to nstreme. (Only good was decrease in latency)
# Changed channel width from 20/40 to only 20. (B/W requirement is just 25-30 mbps)
# Rebooted device at both end.

What other changes shall I do to make the link stable? Attaching device config for both ends.

AP
/interface bridge
add name=bridge1
/interface wireless
set [ find default-name=wlan1 ] band=5ghz-a/n/ac disabled=no frequency=5200 hw-retries=8 mode=bridge wireless-protocol=nstreme
/interface ethernet
set [ find default-name=ether1 ] mac-address=4C:5E:0C:F1:4E:85 name=ether1-local
/interface wireless nstreme
set wlan1 enable-nstreme=yes
/interface vlan
add interface=bridge1 name=MGMT vlan-id=99
/interface wireless security-profiles
set [ find default=yes ] supplicant-identity=MikroTik
add authentication-types=wpa-psk,wpa2-psk eap-methods="" management-protection=allowed mode=dynamic-keys name=SHARK supplicant-identity="" wpa-pre-shared-key=xxxx \
    wpa2-pre-shared-key=xxxx
/ip ipsec proposal
set [ find default=yes ] enc-algorithms=aes-128-cbc
/ip pool
add name=default-dhcp ranges=192.168.88.10-192.168.88.254
/ip dhcp-server
add address-pool=default-dhcp interface=ether1-local name=default
/interface bridge port
add bridge=bridge1 interface=ether1-local
add bridge=bridge1 interface=wlan1
/interface wireless access-list
add comment=P2P disabled=yes mac-address=4C:5E:0C:F0:B4:35 vlan-mode=no-tag
/ip address
add address=192.168.168.20/24 comment=MGMT-ACCESS interface=MGMT network=192.168.168.0
add address=192.168.80.1/24 comment=DIRECT-ACCESS interface=ether1-local network=192.168.80.0
/ip dhcp-client
add comment="default configuration" dhcp-options=hostname,clientid interface=bridge1
/ip dhcp-server network
add address=192.168.88.0/24 comment="default configuration" dns-server=192.168.88.1 gateway=192.168.88.1 netmask=24
/ip dns
set servers=4.2.2.2,8.8.8.8
/ip dns static
add address=192.168.168.20 name=router
/ip firewall filter
add chain=input comment="default configuration" protocol=icmp
add chain=input comment="default configuration" connection-state=established,related
# no interface
add action=drop chain=input comment="default configuration" in-interface=*2
add chain=forward comment="default configuration" connection-state=established,related
add action=drop chain=forward comment="default configuration" connection-state=invalid
# no interface
add action=drop chain=forward comment="default configuration" connection-nat-state=!dstnat connection-state=new in-interface=*2
/ip firewall nat
add action=masquerade chain=srcnat comment="default configuration" disabled=yes out-interface=*2
/ip route
add distance=1 gateway=192.168.168.1
/snmp
set contact="AP" enabled=yes location="NOC" trap-version=2
/system clock
set time-zone-autodetect=no time-zone-name=Asia/Kolkata
/system identity
set name=SHARK-AP
/system logging
set 0 action=disk
add disabled=yes topics=wireless,debug
/system ntp client
set enabled=yes primary-ntp=123.108.200.124 secondary-ntp=194.225.50.25
/system routerboard settings
set cpu-frequency=720MHz
/tool mac-server
set [ find default=yes ] disabled=yes
add interface=ether1-local
/tool mac-server mac-winbox
set [ find default=yes ] disabled=yes
add interface=ether1-local
CPE
/interface bridge
add name=bridge1
/interface wireless
set [ find default-name=wlan1 ] band=5ghz-a/n/ac channel-width=20/40mhz-Ce disabled=no mode=station-bridge name=wlan2 ssid=SHARK-ABTS-AC-AP
/interface ethernet
set [ find default-name=ether1 ] mac-address=4C:5E:0C:F0:B4:34
/interface wireless nstreme
set wlan2 enable-nstreme=yes
/interface vlan
add interface=bridge1 name=MGMT vlan-id=99
/interface wireless security-profiles
set [ find default=yes ] supplicant-identity=MikroTik
add authentication-types=wpa-psk,wpa2-psk eap-methods="" management-protection=allowed mode=dynamic-keys name=SHARK supplicant-identity="" wpa-pre-shared-key=xxxxx \
    wpa2-pre-shared-key=sb5xxxx
/interface bridge port
add bridge=bridge1 interface=ether1
add bridge=bridge1 interface=wlan2
/ip address
add address=192.168.168.19/24 comment=MGMT-ACCESS interface=MGMT network=192.168.168.0
add address=192.168.80.2/24 comment=DIRECT-ACCESS interface=ether1 network=192.168.80.0
/ip dhcp-client
add dhcp-options=hostname,clientid interface=bridge1
/ip dns
set servers=8.8.8.8,4.2.2.2
/ip route
add distance=1 gateway=192.168.168.1
/ip service
set telnet disabled=yes
set ftp disabled=yes
set www port=8000
set ssh disabled=yes
set api disabled=yes
set api-ssl disabled=yes
/snmp
set contact="CPE" enabled=yes location="NOC" trap-version=2
/system clock
set time-zone-autodetect=no time-zone-name=Asia/Kolkata
/system identity
set name=SHARK-CPE
/system ntp client
set enabled=yes primary-ntp=123.108.200.124 secondary-ntp=211.233.84.186
/system routerboard settings
set cpu-frequency=720MHz
/tool sniffer
set filter-interface=ether1 filter-stream=yes streaming-enabled=yes streaming-server=192.168.168.11
Registration table - http://imgur.com/6N0spgO
AP Error Messages - http://imgur.com/aM3BfSx

Thanks,
Srijit B
 
mistry7
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Posts: 1480
Joined: Tue Oct 13, 2009 11:57 am
Location: Germany

Re: How to solve too many pole timeouts in SXT AC P2P link?

Sat Jul 08, 2017 9:03 am

Look for a cleaner channel
 
Luis241091
just joined
Posts: 1
Joined: Tue May 17, 2022 10:28 pm

Re: How to solve too many pole timeouts in SXT AC P2P link?

Tue May 17, 2022 10:37 pm

you solve this problem?, i have a link between a two Netmetal 5SHG with a mAnt30 in a 27-28 miles, and i've the same problem :(

The signal strength is -47dBm, througput 230337kbps, CCQ 97/88%, but the link is intermitent, and the AP show me the same problem on the log
Last edited by Luis241091 on Tue May 17, 2022 10:38 pm, edited 1 time in total.

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