Monitoring Ethernet Performance Monitoring
Display additional graphs repeat
steps 2 and 3
The graphical displays remain displayed on your monitor until
closed.
MAC Forwarding Database
When all features are disabled, the Forwarding Database size is 8K on ML700
When monitoring the forwarding database, be aware of the following:
Due to the hash function implementation of the Forwarding database, some MAC
addresses (falling into the same place in the hash table) are learned but may not be
displayed in the Forwarding database.
L2CP feature uses 0.6K of 8K for internal purposes.
Forwarding Database is affected by working features as follows:
CPU MAC Address is permanently reserved in the Forwarding database but cannot
be viewed;
When Ingress Rate Limiting is enabled (on any port), ML700 allocates 3 entries per
each VLAN (all of them) in advance, to allow IEEE L2 Control Protocol (L2CP).
The allocated addresses can be viewed in the Forwarding database:
o 0x01-0x80-0xC2-0x00-0x00-0x01 - 802.3x Full duplex Pause Frames Address;
o 0x01-0x80-0xC2-0x00-0x00-0x02 - 802.3ad Slow Protocol Multicast Address;
o 0x01-0x80-0xC2-0x00-0x00-0x03 - 802.1X Port Access Entity (PAE) Address.
When STP feature is enabled (in the bridge), ML700 allocates 3 entries per each
VLAN (all of them) in advance, to allow STP interoperability with Cisco. The
allocated addresses can be viewed in the Forwarding database:
o 0x01:0x00:0x0c:0x00:0x00:0x00 - Cisco ISL;
o 0x01:0x00:0x0c:0xcc:0xcc:0xcc - Cisco Discovery Protocol;
o 0x01:0x00:0x0c:0xcc:0xcc:0xcd - PVST+ Cisco Protocol.
Caution: Viewing all MAC addresses in the table via the craft port may take a few minutes and may
affect management access of other users.
To monitor the entire Forwarding database:
1. In the Network Element tree, open Ethernet Bridge. The Ethernet Bridge pane opens.
2. In the Forwarding MAC Addresses area, click the View Dynamic Addresses button. The
Dynamic Forwarding MAC Addresses dialog appears.
3. To view specific MAC addresses, in the View MAC Addresses For area select the
Specific MAC Address option and type in a specific MAC address in HEX format.
4. To view all MAC addresses, in the View MAC Addresses For area select the All MAC
Addresses for VLANs option and from the list box, select All.
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