4 ipv6 troubleshooting, 3 ip forwarding, 1 introduction to ip forwarding – QTECH QSW-8300 Инструкция по настройке User Manual

Page 138: 2 ip route aggregation configuration task, 4 urpf, 1 introduction to urpf, Orwarding, Urpf

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SwitchB(config)#interface tunnel 1

SwitchB(Config-if-Tunnel1)#tunnel source 203.203.203.1

SwitchB(Config-if-Tunnel1)#tunnel destination 202.202.202.1

SwitchB(Config-if-Tunnel1)#tunnel mode ipv6ip

SwitchB(config)#ipv6 route ::/0 tunnel1

16.2.4 IPv6 Troubleshooting

The router lifespan configured should not be smaller than the Send Router advertisement

Interval. If the connected PC has not obtained IPv6 address, you should check RA

announcement switch (the default is turned off).

16.3 IP Forwarding

16.3.1 Introduction to IP Forwarding

Gateway devices can forward IP packets from one subnet to another; such forwarding uses

routes to find a path. IP forwarding of switch is done with the participation of hardware, and

can achieve wire speed forwarding. In addition, flexible management is provided to adjust and

monitor forwarding. Switch supports aggregation algorithm enabling/disabling optimization to

adjust generation of network route entry in the switch chip and view statistics for IP forwarding

and hardware forwarding chip status.

16.3.2 IP Route Aggregation Configuration Task

IP route aggregation configuration task:

1. Set whether IP route aggregation algorithm with/without optimization should be used

Command

Explanation

Global Mode

ip fib optimize

no ip fib optimize

Enables the switch to use optimized IP route
aggregation algorithm; the “no ip fib optimize

disables the optimized IP route aggregation algorithm.

16.4 URPF

16.4.1 Introduction to URPF

URPF (Unicast Reverse Path Forwarding) introduces the RPF technology applied in multicast

to unicast, so to protect the network from the attacks which is based on source address cheat.

When switch receives the packet, it will search the route in the route table using the source

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