Planet SGS-6341 Series Command Manual page 697

output interface for the black hole routing. <precedence> is the route weight, ranging between 1 to
255 and 1 by default.
Command Mode:
Global Configuration Mode.
Usage Guide:
When configuring IPv6 Black Hole Routing, it is much like configuring normal static routing, but
using null0 as the output interface.
Example:
To configure a route to 2001:2:3:4::/64 as a Black Hole Routing.
Switch(config)#ipv6 route 2001:2:3:4::/64 null0
Chapter 39 Commands for GRE Tunnel
39.1 debug gre
Command:
debug gre {packet | events | all}
no debug gre {packet | events | all}
Function:
Open the corresponding debug switch of the GRE tunnel.
Parameter:
all: Open the display function of all debug information for GRE tunnel.
packet: Open the display function of the receiving/sending packets information for GRE tunnel.
events: Open the display function of the event information for GRE tunnel.
Command mode:
Admin mode
Example:
Open the corresponding debug switch of the GRE tunnel, all the information of processing,
encapsulating and forwarding of the GRE tunnel will be shown.
Switch# debug gre all
GRE Tunnel PACKET: sent, src <1.1.1.1>, dst <1.1.1.2>, size <140>, proto <0x0800>, to
<tunnel1>
Configuration
39-2