Difference between revisions of "Stateless Autoconfiguration IPv6 Cisco IOS"
From Teknologisk videncenter
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R1(config-if)#<input>ipv6 nd ra interval msec 100</input> | R1(config-if)#<input>ipv6 nd ra interval msec 100</input> | ||
</source> | </source> | ||
| − | + | =Turning off Periodically send Router Advertisement= | |
;Notice: The Router will still respond to "Router Solicitation" packets and inform the Node of it's prefix on that link. | ;Notice: The Router will still respond to "Router Solicitation" packets and inform the Node of it's prefix on that link. | ||
<source lang=cli> | <source lang=cli> | ||
| Line 62: | Line 62: | ||
</source> | </source> | ||
| − | + | =Turning off Router Advertisement= | |
To turn of Periodically and answers to "Router Solicitation" packets. As seen in the picture below, RA is turned off on three of the interfaces. | To turn of Periodically and answers to "Router Solicitation" packets. As seen in the picture below, RA is turned off on three of the interfaces. | ||
[[Image:IPv6 Router Advertisement turn off.png|400px|Turning off Router Advertisements on unwanted interfaces]] | [[Image:IPv6 Router Advertisement turn off.png|400px|Turning off Router Advertisements on unwanted interfaces]] | ||
| Line 68: | Line 68: | ||
R1(config)#<input>int fa0/1</input> | R1(config)#<input>int fa0/1</input> | ||
R1(config-if)#<input>ipv6 nd ra suppress all</input> | R1(config-if)#<input>ipv6 nd ra suppress all</input> | ||
| + | </source> | ||
| + | =Showing Connected Routers Advertising= | ||
| + | <source lang=cli> | ||
| + | Heimdal#<input>show ipv6 routers</input> | ||
| + | Router FE80::128C:CFFF:FE96:F76F on Vlan1, last update 0 min | ||
| + | Hops 64, Lifetime 1800 sec, AddrFlag=0, OtherFlag=0, MTU=1500 | ||
| + | HomeAgentFlag=0, Preference=Medium | ||
| + | Reachable time 0 (unspecified), Retransmit time 0 (unspecified) | ||
| + | Prefix <notice>2001:16D8:DD85:4::/64</notice> onlink autoconfig | ||
| + | Valid lifetime 2592000, preferred lifetime 604800 | ||
| + | Router FE80::218:18FF:FE7C:B440 on Vlan1, last update 0 min | ||
| + | Hops 64, Lifetime 1800 sec, AddrFlag=0, OtherFlag=0, MTU=1500 | ||
| + | HomeAgentFlag=0, Preference=Medium | ||
| + | Reachable time 0 (unspecified), Retransmit time 0 (unspecified) | ||
| + | Prefix <notice>2001:16D8:DD85:4::/64</notice> onlink autoconfig | ||
| + | Valid lifetime 2592000, preferred lifetime 604800 | ||
</source> | </source> | ||
{{Source cli}} | {{Source cli}} | ||
[[Category:IPv6]][[Category:CiscoIPv6]] | [[Category:IPv6]][[Category:CiscoIPv6]] | ||
Revision as of 12:08, 3 June 2011
Nodes autokonfigurerer egen IPv6 adresse
- Stateless autoconfiguration består af
- Prefix Advertisment
- Routere annoncerer prefixer på link
- RA – Router Advertisment ICMPv6 type 134
- Duplicate Address Detection
- Sikrer unikke IPv6 adresser på Link
- NS – Neighbor Solicitation ICMPv6 type 135
- Prefix Renumbering
- Ændrede eller nye Prefixer annonceres af Routere
- RA – Router Advertisment ICMPv6 type 134
- Prefix Advertisment
K06_HOT_3030FW#<input>show ipv6 interface fastEthernet 0/1 prefix</input>
IPv6 Prefix Advertisements FastEthernet0/1
Codes: A - Address, P - Prefix-Advertisement, O - Pool
U - Per-user prefix, D - Default
N - Not advertised, C - Calendar
PD default [LA] Valid lifetime 2592000, preferred lifetime 604800
AD 2001:16D8:DD85:4::/64 [LA] Valid lifetime 2592000, preferred lifetime 604800Contents
Router Advertisment Interval
Default interval
Router Advertisements are default sent every 200 seconds.
R1(config-if)#<input>do show ipv6 int fa0/0</input>
FastEthernet0/0 is up, line protocol is up
IPv6 is enabled, link-local address is FE80::F225:72FF:FE3B:D6D2
No Virtual link-local address(es):
Description: Inside: Internal LAN
Global unicast address(es):
21:26::1, subnet is 21:26::/64
Joined group address(es):
FF02::1
FF02::2
FF02::1:FF00:1
FF02::1:FF3B:D6D2
MTU is 1500 bytes
ICMP error messages limited to one every 100 milliseconds
ICMP redirects are enabled
ICMP unreachables are sent
ND DAD is enabled, number of DAD attempts: 1
ND reachable time is 30000 milliseconds (using 30000)
ND advertised reachable time is 0 (unspecified)
ND advertised retransmit interval is 1000 milliseconds
<notice>ND router advertisements are sent every 200 seconds</notice>
ND router advertisements live for 1800 seconds
ND advertised default router preference is Medium
Hosts use stateless autoconfig for addresses.Changing Router Advertisement interval
Changing to sending 10 packets pr. second. (Not advisable though - too much traffic generated)
R1(config)#<input>interface fastEthernet 0/0</input>
R1(config-if)#<input>ipv6 nd ra interval msec 100</input>Turning off Periodically send Router Advertisement
- Notice
- The Router will still respond to "Router Solicitation" packets and inform the Node of it's prefix on that link.
R1(config)#<input>int fa0/1</input>
R1(config-if)#<input>ipv6 nd ra suppress</input>Turning off Router Advertisement
To turn of Periodically and answers to "Router Solicitation" packets. As seen in the picture below, RA is turned off on three of the interfaces.
R1(config)#<input>int fa0/1</input>
R1(config-if)#<input>ipv6 nd ra suppress all</input>Showing Connected Routers Advertising
Heimdal#<input>show ipv6 routers</input>
Router FE80::128C:CFFF:FE96:F76F on Vlan1, last update 0 min
Hops 64, Lifetime 1800 sec, AddrFlag=0, OtherFlag=0, MTU=1500
HomeAgentFlag=0, Preference=Medium
Reachable time 0 (unspecified), Retransmit time 0 (unspecified)
Prefix <notice>2001:16D8:DD85:4::/64</notice> onlink autoconfig
Valid lifetime 2592000, preferred lifetime 604800
Router FE80::218:18FF:FE7C:B440 on Vlan1, last update 0 min
Hops 64, Lifetime 1800 sec, AddrFlag=0, OtherFlag=0, MTU=1500
HomeAgentFlag=0, Preference=Medium
Reachable time 0 (unspecified), Retransmit time 0 (unspecified)
Prefix <notice>2001:16D8:DD85:4::/64</notice> onlink autoconfig
Valid lifetime 2592000, preferred lifetime 604800