Инструкции По Установке для 3com S7906E

 

1-11 

Enter system view 

— 

Enter BGP view 

bgp as-number 

— 

Enter IPv6 address family view 

— 

Configure preference values for 
IPv6 BGP external, internal, 
local routes 

preference 
{ external-preference 
internal-preference 
local-preference | 
route-policy 
route-policy-name } 

Optional 

The default preference values of 
external, internal and local routes 
are 255, 255, 130 respectively. 

Configure the default local 
preference 

default local-preference 
value 

Optional 

The value defaults to 100. 

Advertise routes to an IPv6 
peer/peer group with the local 
router as the next hop 

peer { ipv6-group-name | 
ipv6-address } 
next-hop-local 

Required 

By default, IPv6 BGP specifies the 
local router as the next hop for 
routes sent to an IPv6 eBGP 
peer/peer group, but not for routes 
sent to an IPv6 iBGP peer/peer 
group. 

 

z 

To make sure an iBGP peer can find the correct next hop, you can configure routes advertised to 

the IPv6 iBGP peer/peer group to use the local router as the next hop. If BGP load balancing is 

configured, the local router specifies itself as the next hop of routes sent to an IPv6 iBGP peer/peer 

group regardless of whether the peer next-hop-local command is configured. 

z 

In a “third party next hop" network, that is, the two IPv6 eBGP peers reside in a common broadcast 

subnet, the router does not specify itself as the next hop for routes sent to the IPv6 eBGP peer/peer 

group by default, unless the peer next-hop-local command is configured. 

 

Follow these steps to configure the MED attribute: 

Enter system view 

— 

Enter BGP view 

bgp as-number 

— 

Enter IPv6 address family view 

— 

Configure a default MED value 

default med med-value 

Optional 

Defaults to 0 

Enable the comparison of MED 
for routes from different eBGP 
peers 

Optional 

Not enabled by default.