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This chapter describes how to display and modify private network node interface (PNNI) configurations (including the PNNI timers), and how to monitor the link status of neighboring peers.
You can use the following sections to display, configure, and modify PNNI nodes and monitor their neighboring peers:
Step 1 Display the PNNI topology by double-clicking a PNNI domain or peer group name in the AtmDirector main window.
Step 2 Select a node in the PNNI topology map.
Step 3 Select PNNI Options>Node Config & Information.
The PNNI Node Configuration and Information window opens (Figure 6-1). The information in this window is described in Table 6-1.
| Field | Description |
|---|---|
PNNI Node Name | Node name that is distributed to other nodes through PNNI flooding. The default node name for a lowest level node is the host name of the switching system. |
ATM Address | ATM address of the selected node. |
PNNI Node ID | 22-byte address prefixed with the ATM address of the switch. This ID uniquely identifies the node in a PNNI network. |
Domain Name | Name of the PNNI domain in which this node resides. |
# Neighboring Peers | Count of the neighboring nodes at this peer level. |
Peer Group ID | Peer group identifier of the peer group to which this node belongs. |
Lowest Level | Indicates whether this node acts as a lowest level node or whether this node is a logical group node that represents a group of nodes in the next level up. |
Restricted Transit | Specifies whether the node is restricted so that it does not allow support of SVCs transiting this node. Transit calls are calls originating from another ATM switch and passing through the switch. Some edge switches might want to eliminate this transit traffic and only allow traffic originating or terminating at this switch. |
| Node Configuration |
|
Administrative Status | Indicates whether the administrative status of the node is up or down. When the node is up, it is allowed to become active; when the node is down, it is forced to be inactive. |
Auto Summary | Indicates whether this node is configured for automatic address summarization. |
Level | The level of PNNI hierarchy at which this node exists. This value is used to determine the default node ID and the default peer group ID for this node. The LightStream 1010 switch has a default value of 56. This indicates that the first 7 bytes of the switch address are significant. Addresses with a PNNI scope greater than 56 are not advertised by this node. The value of the PNNI level must be within nibble boundaries. |
Redistributed Static Routes | Specifies whether redistribution of ATM static routes to the PNNI routing domain is enabled. Redistribution instructs PNNI to distribute reachability information from non-PNNI sources throughout the PNNI routing domain. Exterior static routes are advertised in exterior-reachable address, PNNI topology state elements (PTSEs); internal static routes are advertised in internal-reachable address PTSEs. The LightStream 1010 ATM switch supports redistribution of static routes, such as those configured on IISP interfaces. Static redistribution is enabled by default. |
Step 4 To display the settings of the PNNI timers for this node, click PNNI Timers....
For a description of this window, see "Displaying the Values of the PNNI Timers."
Step 5 Click Close after you have the read the node configuration.
Step 1 Display the PNNI topology by double-clicking a PNNI domain or peer group name in the AtmDirector main window.
Step 2 Select a node in the PNNI topology map.
Step 3 Select PNNI Options>Node Config & Information.
The PNNI Node Configuration & Information window opens (Figure 6-1).
Step 4 Make any desired changes to the following parameters:
For a description of these parameters, refer to Table 6-1.
Step 5 To modify the settings of the PNNI timers for this node, click PNNI Timers.
For more information, see "Modifying the Values of the PNNI Timers."
Step 6 Click Apply to update the agent with your changes.
You can display the end nodes of a link and identify the type of link between the nodes by doing the following tasks:
Step 1 Display the PNNI topology by double-clicking a PNNI domain or peer group name in the AtmDirector main window.
Step 2 Select a link from the PNNI topology map.
Step 3 Select PNNI Options>Link Information.
The Link Information window opens (Figure 6-2).
The fields in this window are described in Table 6-2.
Step 4 Click OK after you have read the link information.
| Field | Description |
|---|---|
| From |
|
Node | Name of the node from which the link originates |
Port ID | Port ID for this link on the originating node |
| To |
|
Node | Name of the node that terminates the link |
Port ID | Port ID for this link on the terminating node |
| Link Information |
|
Link Type | Type of link described here: Lowest Level Horizontal Link or Lowest Level Outside Link |
PNNI Version | Version of the PNNI routing protocol used to exchange information over this link |
You can access the configured values for the PNNI timers of a node from the PNNI Timers Config window. The PNNI timers are the timeout values used by the node for transmitting and receiving topology information. You can display the PNNI timer values by doing the following tasks:
Step 1 Display the PNNI topology by double-clicking a PNNI domain or peer group name in the AtmDirector main window.
Step 2 Select a node in the PNNI topology map.
Step 3 Select PNNI Options>Node Config & Information.
The PNNI Node Configuration & Information window opens (Figure 6-1).
Step 4 Click PNNI Timers.
The PNNI Timers Config window opens (Figure 6-3). The information contained in this window is described in Table 6-3.
Step 5 Click Close after you have read the PNNI timers.
| Field | Description |
|---|---|
PTSE Refresh Interval | The initial value for the refresh timer that this node uses to drive origination or reorigination of PTSEs in the absence of triggered updates. Updates are triggered by significant topology changes. Default value is 1800; valid range is 30-1800. |
PTSE Lifetime Factor | The value for the lifetime multiplier, expressed as a percentage. The node uses the refresh interval multiplied by this value to determine the initial lifetime for self-originated PTSEs. Default value is 200; valid range is 101-1000. |
PTSE Hold Down | The initial value for the PTSE hold-down timer that the node uses to limit the rate at which it can reoriginate PTSEs. The hold-down timer is used to ensure that PNNI topology state packets (PTSPs) are not sent at unacceptably high rates. Default value is 10; valid range is 1-100. |
RXmt Interval | The period between retransmissions of unacknowledged database summary packets, PTSE request packets, and PTSPs. Default value is 5; valid range is 5-60. |
Peer Delay ACK Interval | The minimum amount of time between transmissions of delayed PTSE acknowledgment packets. Default value is 10; valid range is 10-100. |
AvCR Minimum Threshold | The minimum threshold used in the algorithms that determine significant change for available cell rate parameters, expressed as a percentage. Available cell rate is a measure of the available bandwidth in cells per second, per traffic class. Default value is 3; valid range is 1-99. |
AvCR Multiplier | The proportional multiplier used in the algorithms that determine significant change for available cell rate parameters, expressed as a percentage. Default value is 50; valid range is 1-99. |
Hello Interval | The initial value of the hello timer. In the absence of triggered hellos, the node sends one hello packet on each of its ports at this interval. Default value is 15; valid range is 1-300. |
Hello Inactivity Factor | The value for the hello inactivity factor that this node uses to determine when a neighbor has gone down. Default value is 5. |
Hello Hold Down | The initial value for the hello hold-down timer that the node uses to limit the rate at which it sends hellos. Default value is 10; valid range is 1-100. |
CDV Multiplier | The proportional multiplier used in the algorithms that determine significant change for cell delay variation metrics, expressed as a percentage. Default value is 25; valid range is 1-99. |
CDT Multiplier | The proportional multiplier used in the algorithms that determine significant change for cell transfer delay metrics, expressed as a percentage. Default value is 50; valid range is 1-99. |
You can modify the PNNI timer values by following these steps:
Step 1 Display the PNNI topology by double-clicking a PNNI domain or peer group name in the AtmDirector main window.
Step 2 Select a node in the PNNI topology map.
Step 3 Select PNNI Options>Node Config & Information.
The PNNI Node Configuration & Information window opens (Figure 6-1).
Step 4 Select Down for the Administrative Status.
When the administrative status of the node is up, the configuration cannot be modified.
Step 5 Click PNNI Timers.
The PNNI Timers Config window opens (Figure 6-3).
Step 6 Click the up and down arrows to the right of the fields to make any desired changes to the values of the timers.
The fields in this window, their functions, default values, and valid ranges are described in Table 6-3.
Step 7 Click Apply to accept your changes and close the PNNI Timers Config window.
Step 8 Click Apply in the Node Configuration and Information window to apply your changes to the agent and close the window.
The Neighboring Peer window provides link and status information for a node and its neighboring peer nodes. You can display neighboring peer link and status information by following these steps:
Step 1 Display the PNNI topology by double-clicking a PNNI domain or peer group name in the AtmDirector main window.
Step 2 Select one node, and then hold down the Shift key and select a second node.
Step 3 Select PPNI Options>Neighboring Peer.
The link and status (state) of the selected nodes is displayed in the Neighboring Peer window (Figure 6-4).
The fields in this window are described in Table 6-4.
Step 4 Click OK after you have read the neighboring peer information.
| Field | Description |
|---|---|
Local Node | The selected local node |
Remote Node | List of neighboring peer node names |
State | State of the neighboring peer node as seen by this node |
# of Links | Number of links configured between the selected node and the remote node |
| Links |
|
Local Port | Port identifier on the local node for this link |
Flood | Indicates whether the port is being used for transmission of flooding and database synchronization information to the neighboring peer |
Link Selection | Specifies a method for selecting this link from multiple links to the same neighboring node |
Posted: Thu Sep 30 11:30:42 PDT 1999
Copyright 1989-1999©Cisco Systems Inc.