H3C Technologies H3C SecPath F1000-E - Manual (Page 846)

821
Step Command Remarks
6. Configure IPv6 IS-IS to
filter incoming routes.
ipv6 filter-policy { acl6-number | ipv6-prefix
ipv6-prefix-name | route-policy
route-policy-name } import
Optional.
No filtering policy is
defined by default.
7. Configure IPv6 IS-IS to
redistribute routes from
another routing protocol.
ipv6 import-route protocol [ process-id ]
[ allow-ibgp ] [ cost cost | [ level-1 | level-1-2
| level-2 ] | route-policy route-policy-name |
tag tag ] *
Optional.
Not configured by default.
8. Configure the maximum
number of redistributed
Level 1/Level 2 IPv6
routes.
ipv6 import-route limit number
Optional.
The default setting is
130000.
9. Configure the filtering of
outgoing redistributed
routes.
ipv6 filter-policy { acl6-number | ipv6-prefix
ipv6-prefix-name | route-policy
route-policy-name } export [ protocol
[ process-id ] ]
Optional.
Not configured by default.
10. Enable route leaking.
ipv6 import-route isisv6 level-2 into level-1
[ filter-policy { acl6-number | ipv6-prefix
ipv6-prefix-name | route-policy
route-policy-name } | tag tag ] *
Optional.
Not enabled by default.
11. Specify the maximum
number of ECMP routes.
ipv6 maximum load-balancing number
Optional.
By default, the maximum
number of ECMP routes is
8.
NOTE:
•
The ipv6 filter-policy export command is usually used in combination with the ipv6 import-route
command. If no
protocol is specified for the ipv6 filter-policy export command, routes redistributed
from all routing protocols are filtered before advertisement. If a protocol is specified, only routes
redistributed from the routing protocol are filtered for advertisement.
• For information about ACL, see Access Control Configuration Guide.
• For information about routing policy and IPv6 prefix list, see “Configuring routing policies.”
Configuring IPv6 IS-IS MTR
NOTE:
For more information about MTR and IS-IS MTR, see “Configuring IS-IS.”
On a network comprising both IPv4 and IPv6 topologies, the IPv4 and IPv6 topologies must be consistent
so that both IPv6 IS-IS and IPv4 IS-IS can use the Shortest Path First (SPF) algorithm to perform route
calculation. If they are different, routers supporting both IPv4 and IPv6 send IPv6 packets to routers that
do not support IPv6, and thus packet loss occurs.
To solve the problem, you can configure IPv6 IS-IS Multi-Topology Routing (MTR) to perform route
calculation separately in IPv4 and IPv6 topologies.