Monitoring Transparent Bridging

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Monitoring Transparent Bridging
This section describes how to:

Set a statistics baseline for bridge groups and bridge interfaces.

Remove all dynamic MAC address entries from the forwarding table for bridge groups and bridge interfaces.

Use the show commands to monitor bridge groups, bridge group interfaces, and subscriber policies.

Setting Statistics Baselines

You can set a statistics baseline for a bridge group (using the baseline bridge command) or for a bridge interface (using the baseline bridge interface command).

baseline bridge

Use to set a statistics baseline for a specified bridge group.

The system implements the baseline by reading and storing the statistics at the time the baseline is set and then subtracting this baseline whenever baseline-relative statistics are retrieved.

Example
host1#baseline bridge westford03
There is no no version.

baseline bridge interface

Use to set a statistics baseline for a particular network interface belonging to a bridge group.

The system implements the baseline by reading and storing the statistics at the time the baseline is set and then subtracting this baseline whenever baseline-relative statistics are retrieved.

You must specify the following:

interfaceType - one of the following bridge interface types:

atm

fastEthernet

gigabitEthernet

interfaceSpecifier - interface specified in slot/port or slot/port.subinterface format:

slot - number of the system chassis slot

port - number of the port on the I/O module

subinterface - number of the subinterface in the range 1-4294967293

Example
host1#baseline bridge interface atm 3/3.1
There is no no version.

Removing Dynamic MAC Address Entries

You can remove all dynamic (learned) MAC address entries from the forwarding table for a bridge group (using the clear bridge command) or for a bridge interface (using the clear bridge interface command).

clear bridge

Use to remove all dynamic MAC address entries from the forwarding table for the specified bridge group.

Example
host1#show bridge westford01 table dynamic
  Bridge: westford01 MAC Address Table
   Address         Action         Interface          Age
--------------   ----------   -------------------   -----
0090.1a01.0205   forward      ATM3/3.1                0  
1234.abcd.5678   discard      ---                    ---
host1#clear bridge westford01
host1#show bridge westford01 table dynamic
  Bridge: westford01 MAC Address Table
   Address         Action         Interface          Age
--------------   ----------   -------------------   -----
There is no no version.

clear bridge interface

Use to remove all dynamic MAC address entries for a network interface belonging to a bridge group from the forwarding table for that bridge group.

You must specify the following:

interfaceType - one of the following bridge interface types:

atm

fastEthernet

gigabitEthernet

interfaceSpecifier - interface specified in slot/port.subinterface format:

slot - number of the system chassis slot

port - number of the port on the I/O module

subinterface - number of the subinterface in the range 1-4294967293

Example
host1#show bridge westford02 table dynamic
  Bridge: westford02 MAC Address Table
   Address         Action         Interface          Age
--------------   ----------   -------------------   -----
0090.1a01.0205   forward      ATM3/3.1                0  
0090.1a01.0206   forward      ATM3/3.2               10  
0090.1a01.0207   forward      ATM3/3.3                5  
host1#clear bridge interface atm 3/3.2
host1#show bridge westford02 table dynamic
  Bridge: westford02 MAC Address Table
   Address         Action         Interface          Age
--------------   ----------   -------------------   -----
0090.1a01.0205   forward      ATM3/3.1                0  
0090.1a01.0207   forward      ATM3/3.3                5  
There is no no version.

Monitoring Bridge Groups

You can use show commands to display information about the bridge groups configured on your system.

show bridge

Use to display configuration and statistics information for the specified bridge group.

To display information about the MAC address table and bridge interfaces, use the all keyword.

Field descriptions

BridgeGroup - name assigned to the bridge group

Bridge Mode - bridging capability currently enabled, either concurrent routing and bridging (CRB) or default bridging

Aging Time - length of time, in seconds, that a MAC address entry can remain in the forwarding table

Learning - whether acquisition of dynamically learned MAC addresses is currently enabled or disabled

Max Learn - maximum number of dynamic MAC addresses that the bridge group can learn

Link Status Snmp Traps - whether SNMP link status processing is enabled or disabled for all bridge interfaces in the bridge group

Subscriber Policy - name of the subscriber policy currently in effect for the bridge group

Protocol Actions - when CRB is enabled, displays the protocols (IP, MPLS, or PPPoE) for which explicit routing has been configured

Port Count - number of ports (interfaces) currently configured for the bridge group; this value typically matches the Interface Count

Interface Count - number of bridge group interfaces currently configured for the bridge group

Address Table - displays the current static and dynamic entries in the MAC address table

Address - MAC address of the entry

Action - how the bridge group should handle this entry: forward or discard

Interface - interface type and specifier on which the entry will be forwarded; this value does not appear for entries that are discarded

Age - length of time that a dynamic entry has been in the forwarding table; this value does not appear for static entries

Interfaces - displays statistics information for each bridge group interface; the entries for each interface are preceded by the interface type and specifier (for example, ATM3/3.1)

Port Number - bridge group port number on which this interface resides

Operational Status - operational status of the physical interface: Up, Down, LowerLayerDown, NotPresent

Admin Status - state of the physical interface: Up, Down

Snmp Link Status Trap - whether SNMP link status processing is enabled or disabled for the specified bridge interface

Max Learn - maximum number of dynamic MAC addresses that the bridge group interface can learn

Subscriber Policy - name of the subscriber policy currently in effect for the bridge group interface

In Octets - number of octets received on this interface

In Frames - number of frames received on this interface

In Discards - number of incoming packets discarded on this interface

In Errors - number of incoming errors received on this interface

Out Octets - number of octets transmitted on this interface

Out Frames - number of frames transmitted on this interface

Out Discards - number of outgoing packets discarded on this interface

Out Errors - number of outgoing errors on this interface

queue - hardware packet queue associated with the specified traffic class and interface

Queue length - length of the queue in bytes

Forwarded packets, Bytes - number of packets and bytes forwarded on this queue

Dropped committed packets, Bytes - number of committed packets and bytes that were dropped

Dropped conformed packets, Bytes - number of conformed packets and bytes that were dropped

Dropped exceeded packets, Bytes - number of exceeded packets and bytes that were dropped

Example 1 - displays configuration settings for the specified bridge group
host1#show bridge westford01
  BridgeGroup: westford01
        Bridge Mode:            CRB
        Aging Time:             300 secs
        Learning:               Enabled
        Max Learn:              Unlimited
        Link Status Snmp Traps: Disabled
        Subscriber Policy:      default Subscriber
        Protocol Actions:
           Route  IP
           Route  PPPoE
        Port Count:             1
        Interface Count:        1
Example 2 - displays information about configuration settings, MAC address table entries, and bridge group interfaces for the specified bridge group
host1#show bridge westford01 all
  BridgeGroup: westford01
        Bridge Mode:            CRB
        Aging Time:             300 secs
        Learning:               Enabled
        Max Learn:              Unlimited
        Link Status Snmp Traps: Disabled
        Subscriber Policy:      default Subscriber
        Protocol Actions:
           Route  IP
           Route  PPPoE
        Port Count:             1
        Interface Count:        1
  Address Table:
   Address         Action         Interface          Age
--------------   ----------   -------------------   -----
1011.22b2.333c   forward      ATM3/3.1               ---
1234.abcd.5678   discard      ---                    ---
  Interfaces:
    ATM3/3.1
      Port Number: 1
      Operational Status: LowerLayerDown
      Admin Status: Up
      Snmp Link Status Trap: Disabled
      Max Learn: Unlimited
      Subscriber Policy: default Subscriber
      Statistics:
         In Octets:    0
         In Frames:    0
         In Discards:  0
         In Errors:    0
         Out Octets:   0
         Out Frames:   0
         Out Discards: 0
         Out Errors:   0
      queue 0: traffic class best-effort, bound to bridge 
    ATM3/3.1 
        Queue length 0 Bytes
        Forwarded packets 0, Bytes 0
        Dropped committed packets 0, Bytes 0
        Dropped conformed packets 0, Bytes 0
        Dropped exceeded packets 0, Bytes 0
show bridge groups

Use to display configuration information for all bridge groups currently configured on your system.

To display the configuration settings for all bridge groups on your system, use the details keyword.

Field descriptions

BridgeGroup - name assigned to the bridge group

Bridge Mode - bridging capability currently enabled, either concurrent routing and bridging (CRB) or default bridging

Aging Time - length of time, in seconds, that a MAC address entry can remain in the forwarding table

Learning - whether acquisition of dynamically learned MAC addresses is currently enabled or disabled

Max Learn - maximum number of dynamic MAC addresses that the bridge group can learn

Link Status Snmp Traps - whether SNMP link status processing is enabled or disabled for all bridge interfaces in the bridge group

Subscriber Policy - name of the subscriber policy currently in effect for the bridge group

Protocol Actions - when CRB is enabled, displays the protocols (IP, MPLS, or PPPoE) for which explicit routing has been configured

Port Count - number of ports (interfaces) currently configured for the bridge group; this value typically matches the Interface Count

Interface Count - number of bridge group interfaces currently configured for the bridge group

Example 1 - displays the names of the bridge groups configured on your system
host1#show bridge groups
  BridgeGroup: westford02
  BridgeGroup: westford01
Example 2 - displays the configuration settings for each bridge group on your system
host1#show bridge groups details
  BridgeGroup: westford02
        Bridge Mode:            CRB
        Aging Time:             300 secs
        Learning:               Enabled
        Max Learn:              Unlimited
        Link Status Snmp Traps: Disabled
        Subscriber Policy:      client01
        Protocol Actions:
           Route  IP
           Route  PPPoE
        Port Count:             0
        Interface Count:        0
  BridgeGroup: westford01
        Bridge Mode:            CRB
        Aging Time:             300 secs
        Learning:               Enabled
        Max Learn:              Unlimited
        Link Status Snmp Traps: Disabled
        Subscriber Policy:      default Subscriber
        Protocol Actions:
        Port Count:             1
        Interface Count:        1
show bridge port

Use to display configuration, statistics, and status information for all ports (interfaces) or for a specified port associated with a bridge group.

To display only the port number, interface identifier, and status for each port, use the brief keyword.

Field descriptions

Port Number - bridge group port number on which this interface resides

Operational Status - operational status of the physical interface: Up, Down, LowerLayerDown, NotPresent

Admin Status - state of the physical interface: Up, Down

Snmp Link Status Trap - whether SNMP link status processing is enabled or disabled for the specified bridge interface

Max Learn - maximum number of dynamic MAC addresses that the bridge group interface can learn

Subscriber Policy - name of the subscriber policy currently in effect for the bridge group interface

Statistics - displays statistics information for the specified port

In Octets - number of octets received on this interface

In Frames - number of frames received on this interface

In Discards - number of incoming packets discarded on this interface

In Errors - number of incoming errors received on this interface

Out Octets - number of octets transmitted on this interface

Out Frames - number of frames transmitted on this interface

Out Discards - number of outgoing packets discarded on this interface

Out Errors - number of outgoing errors on this interface

queue - hardware packet queue associated with the specified traffic class and interface

Queue length - length of the queue in bytes

Forwarded packets, Bytes - number of packets and bytes forwarded on this queue

Dropped committed packets, Bytes - number of committed packets and bytes that were dropped

Dropped conformed packets, Bytes - number of conformed packets and bytes that were dropped

Dropped exceeded packets, Bytes - number of exceeded packets and bytes that were dropped

Using the brief keyword displays the following fields:

Port - bridge group port number on which this interface resides

Interface - interface type and specifier associated with the port (for example, ATM3/3.1)

Status - operational status of the physical interface: Up, Down, LowerLayerDown, NotPresent

Example 1 - displays configuration, statistics, and status information for all ports currently associated with the bridge group
host1#show bridge westford01 port 1
    ATM3/3.1
      Port Number: 1
      Operational Status: LowerLayerDown
      Admin Status: Up
      Snmp Link Status Trap: Disabled
      Max Learn: Unlimited
      Subscriber Policy: default Subscriber
      Statistics:
         In Octets:    0
         In Frames:    0
         In Discards:  0
         In Errors:    0
         Out Octets:   0
         Out Frames:   0
         Out Discards: 0
         Out Errors:   0
      queue 0: traffic class best-effort, bound to bridge 
    ATM3/3.1 
        Queue length 0 Bytes
        Forwarded packets 0, Bytes 0
        Dropped committed packets 0, Bytes 0
        Dropped conformed packets 0, Bytes 0
        Dropped exceeded packets 0, Bytes 0
Example 2 - uses the brief keyword to display summary information for each port
host1#show bridge westford01 port brief
 Port            Interface              Status
------   -------------------------   ------------
1        ATM3/3.1                    LowerLayerDown
show bridge table

Use to display information about dynamic and static entries in the MAC address table for the specified bridge group.

To display only static address entries, use the static keyword.

To display only dynamic address entries, use the dynamic keyword.

Field descriptions

Bridge - name of the bridge group for which the MAC address table is displayed

Address - MAC address of the entry

Action - specifies how the bridge group should handle this entry: forward or discard

Interface - interface type and specifier on which the entry will be forwarded; this value does not appear for entries that are discarded

Age - length of time that a dynamic entry has been in the forwarding table; this value does not appear for static entries

Example
host1#show bridge westford01 table static
  Bridge: westford01 MAC Address Table
   Address         Action         Interface          Age
--------------   ----------   -------------------   -----
1a11.22b2.333c   forward      ATM3/3.1               ---
1234.abcd.5678   discard      ---                    ---
Monitoring Bridge Interfaces

You can use the show bridge interface command to display information for a specified bridge interface or for all interfaces assigned to a bridge group.

show bridge interface

Use to display configuration, statistics, and status information for a specified bridge interface or for all interfaces assigned to a bridge group.

Field descriptions

BridgeGroup - name of the bridge group to which the interface belongs

Port Number - bridge group port number on which this interface resides

Operational Status - operational status of the physical interface: Up, Down, LowerLayerDown, NotPresent

Admin Status - state of the physical interface: Up, Down

Snmp Link Status Trap - whether SNMP link status processing is enabled or disabled for the specified bridge interface

Max Learn - maximum number of dynamic MAC addresses that the bridge group interface can learn

Subscriber Policy - name of the subscriber policy currently in effect for the bridge group interface

Statistics - displays statistics information for the specified port

In Octets - number of octets received on this interface

In Frames - number of frames received on this interface

In Discards - number of incoming packets discarded on this interface

In Errors - number of incoming errors received on this interface

Out Octets - number of octets transmitted on this interface

Out Frames - number of frames transmitted on this interface

Out Discards - number of outgoing packets discarded on this interface

Out Errors - number of outgoing errors on this interface

queue - hardware packet queue associated with the specified traffic class and interface

Queue length - length of the queue in bytes

Forwarded packets, Bytes - number of packets and bytes forwarded on this queue

Dropped committed packets, Bytes - number of committed packets and bytes that were dropped

Dropped conformed packets, Bytes - number of conformed packets and bytes that were dropped

Dropped exceeded packets, Bytes - number of exceeded packets and bytes that were dropped

Using the brief keyword displays the following fields:

Interface - interface type and specifier associated with the port (for example, fastEthernet9/1.1)

Port - bridge group port number on which this interface resides

Status - operational status of the physical interface: Up, Down, LowerLayerDown, NotPresent

Example 1 - displays information about a specified interface
host1#show bridge interface fastEthernet 9/1.1
    fastEthernet9/1.1
      BridgeGroup: 1
      Port Number: 1
      Operational Status: Up
      Admin Status: Up
      Snmp Link Status Trap: Disabled
      Max Learn: Unlimited
      Subscriber Policy: atmfe1
      Statistics:
         In Octets:    0
         In Frames:    0
         In Discards:  0
         In Errors:    0
         Out Octets:   0
         Out Frames:   0
         Out Discards: 0
         Out Errors:   0
      queue 0: traffic class best-effort, bound to bridge 
    FastEthernet9/1.1 
        Queue length 0 Bytes
        Forwarded packets 0, Bytes 0
        Dropped committed packets 0, Bytes 0
        Dropped conformed packets 0, Bytes 0
        Dropped exceeded packets 0, Bytes 0
Example 2 - uses the brief keyword to display a summary of all bridge interfaces configured on the system
host1#show bridge westford01 interface brief
Interface            Port       Status
-----------------  --------   ------------
FastEthernet9/1.1     1           Up
FastEthernet9/1.2     2           Up
FastEthernet9/3.1     3           Up
ATM11/0.5             4           Up
ATM11/3.2             5           Up
ATM11/0.7             6           Up
Monitoring Subscriber Policies

You can use the show subscriber-policy command to display the rules for all subscriber policies configured on your system or for a specified subscriber policy.

show subscriber-policy

Use to display the set of forwarding and filtering rules for all default and nondefault subscriber policies configured on the system or for a specified subscriber policy.

For all packet types except Relearn, the command displays permit to indicate that the bridge interface forwards the packets, or deny to indicate that the bridge interface filters the packets. (For information about the meaning of permit and deny for Relearn, see the field descriptions.)

Field descriptions

Subscriber - name of the subscriber policy

ARP - specifies how the bridge interface handles ARP packets

Broadcast - specifies how the bridge interface handles broadcast packets

Multicast - specifies how the bridge interface handles multicast packets

Unknown Destination - specifies how the bridge interface handles packets with unknown unicast DAs

Unicast - specifies how the bridge interface handles unicast (user-to-user) packets

PPPoE - specifies how the bridge interface handles PPPoE packets

Relearn - specifies whether the bridge interface can relearn a MAC address entry on a different interface from the one initially associated with this entry in the forwarding table; permit indicates that relearning is allowed, and deny indicates that relearning is prohibited

Mpls - specifies how the bridge interface handles MPLS packets

Example 1 - displays the rules for all default and nondefault subscriber policies currently configured on the system
host1#show subscriber-policy
  Subscriber: default Subscriber
  ARP                 : Permit
  Broadcast           : Deny
  Multicast           : Permit
  Unknown Destination : Deny
  IP                  : Permit
  Unknown Protocol    : Permit
  Unicast             : Permit
  PPPoE               : Permit
  Relearn             : Permit
  Mpls                : Permit
  Subscriber: default Trunk
  ARP                 : Permit
  Broadcast           : Permit
  Multicast           : Permit
  Unknown Destination : Permit
  IP                  : Permit
  Unknown Protocol    : Permit
  Unicast             : Permit
  PPPoE               : Permit
  Relearn             : Permit
  Mpls                : Permit
  Subscriber: client01
  ARP                 : Permit
  Broadcast           : Permit
  Multicast           : Deny
  Unknown Destination : Deny
  IP                  : Permit
  Unknown Protocol    : Permit
  Unicast             : Permit
  PPPoE               : Permit
  Relearn             : Deny
  Mpls                : Permit
Example 2 - displays the rules for a specified subscriber policy
host1#show subscriber-policy client01
  Subscriber: client01
  ARP                 : Permit
  Broadcast           : Permit
  Multicast           : Deny
  Unknown Destination : Deny
  IP                  : Permit
  Unknown Protocol    : Permit
  Unicast             : Permit
  PPPoE               : Permit
  Relearn             : Deny
  Mpls                : Permit

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