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Cassia X2000 - Page 29

Cassia X2000
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29
Copyright 2023 Cassia Networks, Inc.
Version: EN-2023039-YJ
One AC can use MQTT to communicate with some gateways and use CAPWAP to
communicate with the other gateways at the same time. The user can enable or disable
CAPWAP and MQTT ports on AC by setting “CAPWAP portand “MQTT porton AC
setting page. The user can disable CAPWAP ports if they don’t want gateways to connect
this AC by CAPWAP.
On AC or gateway’s console, the user can set the high priority gateway-AC protocol by
changing parameter “AC-Gateway Protocol Priority” (default is MQTT). The gateway will
try both MQTT and CAPWAP with below strategy. First, the gateway will try to use the high
priority protocol to connect AC. If it doesn’t succeed in 15 minutes, the gateway will try
the low priority protocol for 5 minutes automatically. If it fails again, the gateway will try
the high priority protocol for another 15 minutes, and then repeat. For the gateway using
USB cellular modem, the timer for high priority protocol is 60 minutes. After the gateway
is online, the user can find the actually used protocol by checking “AC-Gateway Protocol
on AC or gateway’s console.
NOTE: From version 2.0.3, a newly installed AC will support MQTT only (CAPWAP disabled
by default). If the user needs to connect a version 1.4.x gateway (only supports CAPWAP)
to a 2.0.3 AC, please enable the CAPWAP ports in AC settings. For the AC upgraded from a
lower version, both CAPWAP and MQTT will be enabled by default.
NOTE: From firmware 2.0.3, the default AC-Gateway Protocol Priorityon the gateway is
MQTT. If the gateway was upgraded from lower versions, the default value will be
CAPWAP.
Please follow the below steps to migrate one gateway from CAPWAP to MQTT.
1) Open outbound TCP port 8883 on gateway side firewall.
2) Fill in AC server address in AC console gateway Config tab or gateway console
Basic tab, if it is empty. NOTE: AC server address is mandatory if AC is in the cloud
or MQTT is used for gateway and AC communication.
3) In the AC console gateway Config tab or gateway console Basic tab, please change
AC-Gateway Protocol Priorityfrom CAPWAP to MQTT.
4) The gateway will disconnect from AC and try to re-connect by MQTT. If the
gateway can’t connect to AC by MQTT, it will try CAPWAP instead automatically.
5) After the gateway is on-line, please check if MQTT is actually used by checking
AC-Gateway Protocolon the AC console gateway Details tab or gateway console
Status tab.
6) When all the gateways managed by one AC have been migrated to MQTT, the
user can disable CAPWAP ports on the AC setting page.

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