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Users Failed to Access the Internet Because RBP Was Not Bound to the Subinterface on the Standby ME60

Publication Date:  2013-09-30 Views:  38 Downloads:  0
Issue Description
IPoE users under two ME60s backing up each other could obtain IP addresses but failed to access the portal page.
Handling Process

Huawei performed the following operations to address the problem:

1. Ran display access-user ip-address to query user online information.

No user online information existed on the active ME60.

2. Checked for user table entries on the standby ME60.

The standby ME60 had user table entries. But remote-standby-profile wlan-6 was not configured for the related subinterface on the standby ME60.

3. Shut down the subinterface, released users under the domain, added remote-standby-profile wlan-6, and enabled the subinterface.

Users accessed the Internet properly.
Root Cause

The RBP was used to bind the remote standby profile to an interface. When RBP was bound to the subinterface on the active ME60 but was not to the subinterface on the standby ME60, both the active and standby ME60s responded to a user's online request by using the virtual and physical MAC addresses, respectively. The user went online on the standby ME60 if the standby ME60 responded its DHCP request prior to the active ME60. Because RBP was not bound to the standby ME60, the user table entry failed to be backed up to the active ME60. As a result, packets from the user could not be responded by the active ME60

After being bound with RBP, subinterfaces on the active and standby ME60s were controlled based on the VRRP status, and the standby ME60 did not response user online requests.
Solution
Shut down the subinterface, released users under the domain, added remote-standby-profile wlan-6, and enabled the subinterface.
Suggestions
Ensure that data on the active and standby ME60s is synchronized.

END