Brocade FastIron Ethernet Switch Administration Guide - Manual (Page 134)

Global unicast address(es):
1001::1 [Preferred], subnet is 1001::/64
1011::1 [Preferred], subnet is 1011::/64
Joined group address(es):
ff02::1:ff04:2
ff02::5
ff02::1:ff00:1
ff02::2
ff02::1
MTU is 1480 bytes
ICMP redirects are enabled
No Inbound Access List Set
No Outbound Access List Set
OSPF enabled
The display command above reflects the following configuration.
device#show running-config interface tunnel 1
!
interface tunnel 1
port-name ManualTunnel1
tunnel mode ipv6ip
tunnel source loopback 1
tunnel destination 10.1.1.1
ipv6 address 1011::1/64
ipv6 address 1001::1/64
ipv6 ospf area 0
Interface level IPv6 tunnel information TABLE 16
Field Description
Interface Tunnel status The status of the tunnel interface can be one of the following:
• up - IPv4 connectivity is established.
• down - The tunnel mode is not set.
• administratively down - The tunnel interface was disabled with the disable command.
Line protocol status The status of the line protocol can be one of the following:
• up - IPv6 is enabled through the ipv6 enable or ipv6 address command.
• down - The line protocol is not functioning and is down.
ECMP load sharing for IPv6
The IPv6 route table selects the best route to a given destination from among the routes in the tables
maintained by the configured routing protocols (BGP4, OSPF, static, and so on). The IPv6 route table
can contain more than one path to a given destination. When this occurs, the Brocade device selects
the path with the lowest cost for insertion into the routing table. If more than one path with the lowest
cost exists, all of these paths are inserted into the routing table, subject to the configured maximum
number of load sharing paths (by default 4). The device uses Equal-Cost Multi-Path (ECMP) load
sharing to select a path to a destination.
When a route is installed by routing protocols or configured static route for the first time, and the IPv6
route table contains multiple, equal-cost paths to that route, the device checks the IPv6 neighbor for
each next hop. Every next hop where the link layer address has been resolved will be stored in
hardware. The device will initiate neighbor discovery for the next hops whose link layer addresses are
not resolved. The hardware will hash the packet and choose one of the paths. The number of paths
would be updated in hardware as the link layer gets resolved for a next hop.
ECMP load sharing for IPv6
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