Configuring VLANs Using SNMP
3.3.1 Modifying a Config Egress List Entry
To modify a Config Egress List entry, proceed as follows:
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1 | Set the index outside its valid range. |
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2 | Set the VLAN ID to the value desired. |
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3 | Set the port variable to the value desired. |
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4 | Set the index to the table entry you desire to modify. |
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5 | Write any value to the status variable. |
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When the write to the status entry is completed, an attempt will be made to carry out the command.
If modifying an existing entry in the table, the VLAN ID in the table entry must match the local variable. If it does not the command will be aborted.
If the VLAN ID is already in use, the index must also match. If it does not the command will be aborted.
The command will abort, if the VLAN ID is not valid, if the VLAN does not exist, or all ports are not members of that VLAN.
After all checks pass, the VLAN ID is copied to the default table based on the index specified. The ports selected are added to the existing list of ports in the table entry.
If the switch is operating in 802.1Q mode, the following will be performed by the firmware:
•Inform the hardware of the new PVID for the port(s).
•Delete the old default VLAN ID for these ports (PVID/MAC address pair).
•Add the new MAC address pair for these ports (PVID/MAC address pair).
•Delete all learned addresses for this VLAN.
•Flush all ARP entries.
