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debug ospf event
Display information on OSPF-related events,
such as adjacencies, flooding information,
designated router selection, and SPF
calculation.
such as adjacencies, flooding information,
designated router selection, and SPF
calculation.
debug ospf ism [events | status | timers]
Display flooding information, SPF calculation
on internal area-related events.
on internal area-related events.
debug ospf lsa [flooding | refresh]
Display flooding information, SPF calculation
on OSPF-generate related events.
on OSPF-generate related events.
debug ospf nsm [events | status| timers]
Display information on adjacencies.
debug ospf nssa
Display OSPF NSSA information.
show debugging ospf
Display OSPF-related debugging messages
5.8 Virtual Router Redundancy Protocol (VRRP)
Virtual Router Redundancy Protocol (VRRP) specifies a protocol that dynamically elects a gateway router
from among virtual routers running VRRP on a LAN. VRRP enables a group of routers to form a single
virtual router. The LAN hosts can then be configured with the virtual router as their default gateway. The
virtual router, representing a group of routers, is also known as a VRRP group identified by Virtual Router
Identity (VRID). This allows hosts to maintain access to other networks without requiring configuration of
dynamic routing or router discovery protocols on every end-host. The IC35516 VRRP implementation fully
conforms to the virtual router redundancy protocol outlined in RFC 2338.
5.8.1 VRRP Configuration
All VRRP configuration commands are provided within the interface configuration mode.
Router(config-if-veth1)# ip vrrp ?
<1-255> Virtual router ID (VRID)
Router(config-if-veth1)# ip vrrp 4 ?
authentication Enable authentication
description Set virtual router description
ip Set the IP Address
preempt Enable preempt mode
priority Set priority to specified VRID
timers VRRP Timers
Command Purpose
ip vrrp VRID ip A.B.C.D
ip vrrp VRID ip A.B.C.D
Enables VRRP on an interface and identifies the
primary IP address of the virtual router.
primary IP address of the virtual router.
ip vrrp VRID description text
Assigns a text description to the VRRP VRID group.
ip vrrp VRID preempt
Configures the router to take over as master virtual
router for a VRRP VRID group if it has a higher priority
than the current master virtual router. This command is
enabled by default.
router for a VRRP VRID group if it has a higher priority
than the current master virtual router. This command is
enabled by default.
ip vrrp VRID priority level
Sets the priority level of the router within a VRRP VRID
group. The default value is 100.
group. The default value is 100.
ip vrrp VRID timers [advertise
interval]
interval]
Configures the interval between successive
advertisements by the master virtual router in a VRRP
VRID group.
advertisements by the master virtual router in a VRRP
VRID group.
ip vrrp VRID authentication string
Authenticates VRRP packets received from other
routers in the VRID group. If you configure
authentication, all routers within the VRRP VRID group
must use the same authentication string.
routers in the VRID group. If you configure
authentication, all routers within the VRRP VRID group
must use the same authentication string.