Users Guide

S - static
B - BGP, IN - internal BGP, EX - external BGP
O - OSPF, IA - OSPF inter area, N1 - OSPF NSSA external type 1,
N2 - OSPF NSSA external type 2, E1 - OSPF external type 1,
E2 - OSPF external type 2, > - non-active route
Gateway of last resort is not set
Destination Gateway Dist/Metric Last Change
------------------------------------------------------------------
C 10.1.1.0/24 via 10.1.1.1 vlan100 0/0 01:16:56
B EX 10.1.2.0/24 via 10.1.2.1 vlan101 20/0 01:16:56
O 10.1.3.0/24 via 10.1.3.1 vlan102 110/2 01:16:56
B IN 10.1.4.0/24 via 10.1.4.1 vlan103 200/0 01:16:56
Supported Releases 10.2.0E or later
IPv6 routing
OS10 supports IPv6 routing and addressing, including the Neighbor Discovery protocol, stateless IPv6 address autoconguration, and
stateful IPv6 address conguration. Congure IPv6 routing for IP hosts to communicate with one another in the same network, or in
dierent networks.
Stateless autoconguration
When an interface comes up, OS10 uses stateless autoconguration to generate a unique link-local IPv6 address with a FE80::/64 prex
and an interface ID generated from the MAC address. To use stateless autoconguration to assign a globally unique address using a prex
received in router advertisements, enter the
ipv6 address autoconfig command.
Stateless autoconguration sets an interface in host mode, and allows the interface connected to an IPv6 network to autocongure IPv6
addresses and communicate with other IPv6 devices on local links. A DHCP server is not required for automatic IPv6 interface
conguration. IPv6 devices on a local link send router advertisement (RA) messages in response to solicitation messages received at
startup.
Stateless autoconguration of IPv6 addresses is performed using:
Prex
advertisement Routers use router advertisement messages to advertise the network prex. Hosts append their interface-identier
MAC address to generate a valid IPv6 address.
Duplicate address
detection
An IPv6 host node checks whether that address is used anywhere on the network using this mechanism before
conguring its IPv6 address.
Prex renumbering Transparent renumbering of hosts in the network when an organization changes its service provider.
IPv6 provides the exibility to add prexes on router advertisements in response to a router solicitation (RS). By default, RA response
messages are sent when an RS message is received. The system manipulation of IPv6 stateless autoconguration supports the router side
only. Neighbor Discovery (ND) messages advertise so the neighbor can use the information to auto-congure its address. Received ND
messages are not used to create an IPv6 address.
Inconsistencies in router advertisement values between routers are logged. The values checked for consistency include:
• Current hop limit
• M and O ags
• Reachable time
• Retransmission timer
• MTU options
• Preferred and valid lifetime values for the same prex
250
Layer 3