Huawei Quidway S5600 Series - Page 376

Operation Manual – Routing Protocol
Quidway S5600 Series Ethernet Switches-Release 1510 Chapter 5 BGP Configuration
Huawei Technologies Proprietary
5-31
Operation Command Description
return
—
refresh bgp { all |
ip-address | group
group-name }
[ multicast ]
{ import | export }
Optional
system-view
Perform soft refreshment of
BGP connection manually
bgp as-number
Enter BGP view again
Configure BGP to perform
MD5 authentication when
establishing TCP connection
peer { group-name |
ip-address }
password { cipher |
simple } password
Optional
By default, BGP dose not
perform MD5
authentication when
establishing TCP
connection.
Caution:
z The reasonable maximum interval for sending Keepalive message is one third of the
Holdtime, and the interval cannot be less than 1 second, therefore, if the Holdtime is
not 0, it must be 3 seconds at least.
z BGP soft reset can refresh the BGP routing table and apply a new routing policy
without breaking the NGP connections.
z BGP soft reset requires all BGP routers in a network support the route-refresh
function. If there is a router not supporting the route-refresh function, you need to
configure the peer keep-all-routes command to save all the initial routing information
of peers for the use of BGP soft reset.
z When configured in BGP view, MD5 authentication is available for the VPNv4
extension of MP_BGP, because they use the same TCP connection.
5.7 Configuring a Large-Scale BGP Network
In large-scale network, there are large quantities of peers. Configuring and maintaining
the peer becomes a big problem. Using peer group can ease the management and
improve the routes sending efficiency. According to the different ASs where peers
reside, the peer groups fall into IBGP peer groups and EBGP peer groups. For the
EBGP peer group, it can also be divided into pure EBGP peer group and hybrid EBGP
peer group according to whether the peers in the EBGP group belong to the same
exterior AS or not.