Ospf nonstop forwarding – Dell POWEREDGE M1000E User Manual
Page 920
38-28
Cisco Catalyst Blade Switch 3130 and 3032 for Dell Software Configuration Guide
OL-13270-03
Chapter 38 Configuring IP Unicast Routing
Configuring OSPF
OSPF Nonstop Forwarding
The switch or switch stack supports two levels of nonstop forwarding (NSF):
•
OSPF NSF Awareness, page 38-28
•
OSPF NSF Capability, page 38-29
OSPF NSF Awareness
The IP-services feature set supports OSPF NSF awareness for IPv4. When the neighboring router is
NSF-capable, the Layer 3 switch continues to forward packets from the neighboring router during the
interval between the primary route processor in a router failure and the take-over of the backup route
processor, or while the primary route processor is manually reloaded for a nondisruptive software
upgrade.
This feature cannot be disabled. For more information on this feature, see the “OSPF Nonstop
Forwarding (NSF) Awareness” section of the Cisco IOS IP Routing Protocols Configuration Guide,
Release 12.4 at this URL:
NSF
1
awareness
Enabled
2
. Allows Layer 3 switches to continue forwarding
packets from a neighboring NSF-capable router during hardware
or software changes.
NSF capability
Disabled.
Note
The switch stack supports OSPF NSF-capable routing
for IPv4.
Router ID
No OSPF routing process defined.
Summary address
Disabled.
Timers LSA group pacing
240 seconds.
Timers shortest path first (spf)
spf delay: 5 seconds.
spf-holdtime: 10 seconds.
Virtual link
No area ID or router ID defined.
Hello interval: 10 seconds.
Resend interval: 5 seconds.
Send delay: 1 second.
Dead interval: 40 seconds.
Authentication key: no key predefined.
Message-digest key (MD5): no key predefined.
1.
NSF = nonstop forwarding.
2.
OSPF NSF awareness is enabled for IPv4 on switches running the IP services feature set.
Table 38-5
Default OSPF Configuration (continued)
Feature
Default Setting