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User Manual
Chapter 5. Commands for Black Hole Routing 64
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Chapter 5 COMMANDS FOR BLACK HOLE ROUTING
5.1 ip route null0
Command: ip route {<ip-prefix> <mask>|<ip-prefix>|<prefix-length>} null0 [<distance>]
no ip route {<ip-prefix> <mask>|<ip-prefix>|<prefix-length>} null0
Function: To configure routing destined to the specified network to the interface of
null0.
Parameters: <ip-prefix> and <mask> are the IP address and network address mask of
the destination, in dotted decimal format: <ip-prefix> and <prefix-length> are the IP
address of the destination and the length of the prefix respectively; null0 is the output
interface for the black hole routing; <distance> is the management distance of the
routing entry with limitation between 1 and 255.
Default: None.
Command Mode: Global Configuration Mode.
Usage Guide: Null0 should be used as the output interface for IPv4 Black Hole Routing.
Example: To configure the routing to 192.168.188.0/24 as a Black Hole Routing.
Switch (config)# ip route 192.168.188.0/24 null0 20
5.2 ipv6 route null0
Command: ipv6 route <ipv6-prefix|prefix-length> null0 [<precedence>]
no ipv6 route <ipv6-prefix|prefix-length> null0
Function: To configure routing destined to the specified network to the interface of
null0.
Parameters: <ipv6-prefix> is the IPv6 network static route addressof the destination, in
dotted decimal format. <prefix-length> is the IPv6 address of the destination and the
length of the prefix. null0 is the output interface for the black hole routing.
<precedence> is the route weight, ranging between 1 to 255 and 1 by default.
Default: None.
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
Содержание
- Content p.2
- Ip prefix list seq p.7
- Ip prefix list description p.7
- Chapter 1 commands for routing policy p.7
- Match as path p.8
- Ip prefix list sequence number p.8
- Match interface p.9
- Match community p.9
- Match ip p.9
- Match ipv6 next hop p.10
- Match ipv6 address p.10
- Match origin p.11
- Match metric p.11
- Route map p.12
- Match tag p.12
- Match route type p.12
- Set as path p.13
- Set aggregator p.13
- Set comm list p.14
- Set atomic aggregate p.14
- Set extcommunity p.15
- Set community p.15
- Set local preference p.16
- Set ip next hop p.16
- Set metric p.16
- Set origin p.17
- Set metric type p.17
- Set vpnv4 next hop p.18
- Set tag p.18
- Set originator id p.18
- Set weight p.19
- Show route map p.21
- Show router id p.22
- Ip route p.23
- Chapter 2 commands for static route p.23
- Show ip route p.24
- Ip route vrf p.24
- Show ip route vrf p.25
- Show ip route fib p.25
- Accept lifetime p.26
- Chapter 3 commands for rip p.26
- Debug rip p.27
- Clear ip rip route p.27
- Address family ipv4 p.27
- Debug rip redistribute route receive p.28
- Debug rip redistribute message send p.28
- Default metric p.29
- Default information originate p.29
- Distribute list p.30
- Distance p.30
- Ip rip aggregate address p.31
- Exit address family p.31
- Ip rip authentication mode p.32
- Ip rip authentication key chain p.32
- Ip rip authentication string p.33
- Ip rip authentication cisco compatible p.33
- Ip rip receive version p.34
- Ip rip receive packet p.34
- Ip rip split horizon p.35
- Ip rip send version p.35
- Ip rip send packet p.35
- Key chain p.36
- Maximum prefix p.37
- Key string p.37
- Network p.38
- Neighbor p.38
- Offset list p.39
- Passive interface p.39
- Redistribute p.40
- Recv buffer size p.40
- Router rip p.41
- Redistribute ospf vrf command p.41
- Send lifetime p.42
- Show ip protocols rip p.43
- Show debugging rip p.43
- Show ip rip database p.45
- Show ip rip p.45
- Show ip rip interface vrf p.46
- Show ip rip interface p.46
- Show ip rip database vrf p.46
- Show ip rip aggregate p.46
- Show ip vrf p.47
- Timers basic p.47
- Show ip rip redistribute p.47
- Version p.48
- Default information originate p.49
- Clear ipv6 route p.49
- Chapter 4 commands for ripng p.49
- Distance p.50
- Default metric p.50
- Distribute list p.51
- Debug ipv6 rip p.51
- Debug ipv6 rip redistribute route receive p.52
- Debug ipv6 rip redistribute message send p.52
- Ipv6 rip split horizon p.53
- Ipv6 rip aggregate address p.53
- Neighbor p.54
- Ipv6 router rip p.54
- Passive interface p.55
- Offset list p.55
- Redistribute ospf p.56
- Redistribute p.56
- Router ipv6 rip p.57
- Show debugging ipv6 rip p.58
- Show ipv6 rip interface p.58
- Show ipv6 rip redistribute p.59
- Show ipv6 protocols rip p.59
- Show ipv6 rip p.60
- Show ipv6 rip database p.61
- Show ipv6 rip aggregate p.61
- Timers basic p.62
- Show ipv6 rip redistribute p.62
- Ipv6 route null0 p.64
- Ip route null0 p.64
- Chapter 5 commands for black hole routing p.64
- Chapter 6 commands for bfd p.65
- Bfd authentication key md5 p.65
- Bfd authentication key p.65
- Bfd echo p.66
- Bfd authentication key text p.66
- Bfd echo source ip p.66
- Bfd enable p.67
- Bfd echo source ipv6 p.67
- Bfd interval p.68
- Bfd mode p.69
- Bfd min echo recv interval p.69
- Ip ospf bfd enable p.70
- Debug bfd p.70
- Ipv6 ospf bfd enable instance id p.71
- Ipv6 ospf bfd enable p.71
- Ip route bfd p.71
- Ipv6 route bfd p.72
- Ipv6 rip bfd enable p.72
- Rip bfd enable p.73
- Neighbor p.73
- Show bfd neighbor p.74
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Изучите команды для настройки черной дыры в маршрутизации IPv4 и IPv6. Узнайте, как использовать интерфейс null0 для управления маршрутами.