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ManualsBrandsHP ManualsNetwork HardwareHP 5406R-8XGT/8SFP+ (No PSU) v2 zl2 Switch

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Example 175 Displaying the OSPFv3 SPF log

HP Switch(ospf3)# show ipv6 ospf3 spf-log

OSPFv3 SPF (SHORTEST PATH FIRST) LOG

spf instance Reason

--------------- ---------------------------

1 Router LS Update

2 Router LS Update

3 Generated RTR LSA

4 Generated NTW LSA

5 Network LS Update

6 Network LS Update

7 Generated RTR LSA

8 Router LS Update

9 Generated RTR LSA

10 Re-Init

11 Incremental LS Update

... ...

Debugging OSFP routing messages

Syntax:

retransmission | spf ]

Turns on the tracing of OSPFv3 packets. For more information, see the "Debug

Command" section in the "Troubleshooting" appendix of the Management and

Configuration Guide for your routing switch.

Graceful Shutdown of OSPF Routing

It is now possible to gracefully shut down OSPF routing on HP switches without losing packets that

are in transit. OSPF neighbors are informed that the router should not be used for forwarding

traffic, which allows for maintenance on the switch without interrupting traffic in the network. There

is no effect on the saved switch configuration.

Prior to a switch shutdown, the CLI/SNMP reload command or the CLI boot command is executed

to initiate the sending of OSPF “empty Hello list” messages on the interfaces that are part of the

OSPF routing configuration. After a small delay (approximately 2 seconds) that allows the messages

to be transmitted on all applicable interfaces, the boot or reload command continues.

Modules Operating in NonStop Mode

When a switch is in standalone mode and OSPF routing is enabled, the “empty Hello list” is

transmitted whenever the boot or reload commands are executed.

When the switch is operating in nonstop switching mode (redundant) and a single module is being

reloaded or booted, the standby module will notify neighboring switches of the management

module failover. If the failover fails, the “empty Hello list” is transmitted before the switch is rebooted.

When a switch is operating with multiple management modules in warm standby mode, the “empty

Hello list” is sent when a reload or boot command is executed. The standby management module

sends out OSPF Hello packets after becoming the active management module.

Enabling load-sharing among next-hop routes

For more information about the equal-cost multi-path (ECMP) feature, see “About equal-cost multi-path

routing” (page 255).

Debugging OSFP routing messages 245