A customer purchased five SNS2224 switches and put them in one equipment
room. During remote login to a switch using Web Tools, the initializing session
is stuck at 15%.
Device model: SNS2224
FOS version: 7.2.1
As shown in the following figure, the initializing session is stuck at 15% during the remote login to the
switch using Web Tools.
Check the firewall configuration on the network management client. It is
found that no firewall is configured for the switch. In addition, the Web Tools
of the SNS2248 switch (same version: 7.2.1) in the other equipment room
purchased by the customer in the same period is functional.
Check whether the Web Tools service is abnormal. This issue occurs when a
user logs in to a switch of an earlier version as user root. Run the webdconfigure command to restart the web service.
The issue persists after the restart operation.
Try to export the supportsave file from the SNS2224 switch and import it to the FTP/SFTP server of the
management client. It is found that the log cannot be exported normally, but
the file can be properly exported from the SNS2248 switch in the other
equipment room. Log in to the FTP/SFTP server of the management client as user root using an FTP or SFTP command. The
login still fails, indicating that there are some restrictions on the network
between the SNS2224 switch in the equipment room and the network management
Try to access the Web Tools of the SNS222 switch from a server in the same equipment
room. The access succeeds, indicating that the switch is functional.
There are some restrictions
on the network between the SNS2224 switch in the equipment room and the network
management client. For example, the firewall at a certain application layer can
disassemble packages and analyze traffic. If the customer accesses the switch
using HTTP, the firewall may disassemble the package. As a result, the Web
Tools of the network management client cannot be started normally.
Check the firewall settings and allow bidirectional
traffic to transmit between the network management client and ports 80 as well
as port 21 or 22 on the switch.
1. If a large number of switches at a site have a
common access issue, which may be caused by network configuration, because the
probability that all these switches are faulty is extremely low.
2. It is important to perform the cross test on the
switch network. In addition to testing the path from the client to the switch,
check whether the path from the switch to the client is normal.