Enterasys Networks 9034313-07 Ipv6 ospf network, By default, MTU mismatch detection is enabled

ipv6 ospf network

Defaults

By default, MTU mismatch detection is enabled.

Mode

Router interface configuration: C3(su)‐>router(Config‐if(Vlan 1))#

Usage

OSPF Database Description packets specify the size of the largest IP packet that can be sent without fragmentation on the interface. When a router receives a Database Description packet, it examines the MTU advertised by the neighbor. By default, if the MTU is larger than the router can accept, the Database Description packet is rejected and the OSPF adjacency is not established.

Use this command to prevent the OSPFv3 router process from checking whether neighbors are using the same maximum transmission unit (MTU) on a common interface when exchanging Database Description packets.

Use the no form of this command to enable MTU mismatch detection.

Example

This example disables MTU mismatch detection on router interface VLAN 7.

C3(su)->router(Config)# interface vlan 7

C3(su)->router(Config-if(Vlan 7))# ipv6 ospf mtu-ignore

ipv6 ospf network

This command changes the default OSPFv3 network type for the router interface.

Syntax

ipv6 ospf network {broadcast point-to-point}

no ipv6 ospf network {broadcast point-to-point}

Parameters

broadcast	Sets the network type to broadcast.
point‐to‐point	Sets the network type to point‐to‐point.

Defaults

Default network type is broadcast.

Mode

Router interface configuration: C3(su)‐>router(Config‐if(Vlan 1))#

Usage

Normally, the network type is determined from the physical IP network type. By default, all Ethernet networks are OSPFv3 type broadcast. Similarly, tunnel interfaces default to point‐to‐ point. When an Ethernet port is used as a single large bandwidth IP network between two routers, the network type can be point‐to‐point since there are only two routers. Using point‐to‐point as the network type eliminates the overhead of the OSPFv3 designated router election. It is normally not useful to set a tunnel to OSPFv3 network type broadcast.

SecureStack C3 Configuration Guide 25-25