Operation Manual – IRF Fabric 
Quidway S5600 Series Ethernet Switches-Release 1510  Chapter 1  
IRF Fabric Configuration
 
Huawei Technologies Proprietary 
1-3 
z  If a fabric port of a switch is connected to a non-fabric port, the switch will not 
receive DISC packets from the peer. In this case, the switch cannot join the 
fabric. 
z  If the switch can receive DISC packets sent by the peer, the FTM module 
determines whether peer sending ports correspond to local receiving ports 
according to information in the packet. That is, if a DISC packet received by the 
left port of the switch is sent by the right port of the peer device, the packet is 
regarded legal. Otherwise, the packet is regarded illegal and is discarded. 
z  If the maximum number of devices allowed by the fabric is reached, the devices 
in the fabric do not send DISC packets and discard the received DISC packets. 
This prevents new devices from joining the fabric. 
z  After receiving a DISC packet from a directly connected device, a device in a 
fabric checks whether the device information (that is, the Fabric name and 
software version) contained in the packet and those of its own are the same. If 
not, the received DISC packet is illegal and will be discarded. 
z  If authentication is enabled in the fabric, the current device in the fabric 
authenticates received packets sent by new directly connected devices. Packets 
that fail to pass the authentication will be discarded. 
1.2.3  Prompt Information Analysis and Solution 
The IRF Fabric peer detection function outputs different prompt information according 
to the connection conditions of the devices within the Fabric. You can refer to the 
following table to perform corresponding adjustment and maintenance for the Fabric. 
Table 1-1 Prompt information analysis and solution  
Prompt  Analysis  Solution 
normal  it indicates the fabric operates properly
temporary  it indicates the port status is changing
redundance port 
it indicates the port is the redundant 
port in fabric ring topology 
The “normal”, 
“temporary” and 
“redundance port” 
information do not 
mean a device or a 
fabric operates 
improperly. No 
measure is needed 
for any of these three 
types of information 
Tw
sam
the right port
l
o fabric ports of the 
e device (that is, 
 and the 
eft port) are 
connected. 
Pull out one end of 
the cable and connect 
it to a fabric port of 
another switch. 
connection error 
The port 
matching 
three kinds 
of errors 
The left and right fabric 
ports of two devices 
are not connected in a 
crossed way. 
Connect the left and 
right ports of two 
devices in a crossed 
way.