Инструкции По Установке для 3com S7906E

 

1-19 

Follow these steps to enable replying to multicast echo requests: 

Enter system view 

— 

Enable replying to multicast 
echo requests 

Required 

Not enabled by default. 

 

A device sends out an ICMPv6 time exceeded packet in the following cases: 

z 

If a received IPv6 packet’s destination IP address is not the local address and its hop count is 1, the 

device sends an ICMPv6 time-to-live count exceeded packet to the source. 

z 

Upon receiving the first fragment of an IPv6 datagram with the destination IP address being the 

local address, the device starts a timer. If the timer expires before all the fragments arrive, an 

ICMPv6 fragment reassembly time exceeded packet is sent to the source. 

If large amounts of malicious packets are received, the performance of a device degrades greatly 

because it has to send back ICMP time exceeded packets. You can disable sending of ICMPv6 time 

exceeded packets. 

Follow these steps to enable sending of ICMPv6 time exceeded packets: 

Enter system view 

— 

Enable sending of ICMPv6 time 
exceeded packets 

Optional 

Enabled by default. 

 

Display the IPv6 FIB entries (for 
distributed devices) 

display ipv6 fib [ slot slot-number ] 
[ ipv6-address ] 

Available in any view

Display the IPv6 FIB entries (for 
distributed IRF devices) 

display ipv6 fib [ chassis 
chassis-number slot slot-number ] 
[ ipv6-address ] 

Available in any view

Display the IPv6 interface settings 

display ipv6 interface [ interface-type 
[ interface-number ] ] [ verbose ] 

Available in any view

Display neighbor information (for 
distributed devices) 

display ipv6 neighbors 
{ { ipv6-address | all | dynamic | 
static } [ slot slot-number ] | interface 
interface-type interface-number | vlan 
vlan-id } [ | { begin | exclude | 
include } regular-expression ] 

Available in any view