HP 5500 Ei 5500 Si Switch Series Configuration Guide

 202 
Task Remarks 
Configuring the interval for sending the same 
update Optional. 
Configuring BGP soft-reset 
Optional. 
Enabling the BGP ORF capability Optional. 
Enabling 4-byte AS number suppression Optional. 
Setting the DSCP value for BGP packets Optional. 
Enabling quick EBGP session reestablishment Optional. 
Enabling MD5 authentication for TCP connections Optional. 
Configuring BGP load balancing Optional. 
Forbiding session establishment with a peer or 
peer group Optional. 
Configuring a...

 203 
Step Command Remarks 
1.  Enter system view. 
system-view  N/A 
2.  Configure a global router ID. 
router id router-id  Optional. 
Not configured by default.  
If no global router ID is configured, 
the highest loopback interface IP 
address—if any—is used as the 
router ID. If no loopback interface IP 
address is available, the highest 
physical interface IP address is used, 
regardless of the interface status. 
3.
  Enable BGP and enter BGP 
view.  bgp
 as-number   Not enabled by default. 
4....

 204 
Step Command Remarks 
1.  Enter system view. 
system-view  N/A 
2.  Enter BGP view. 
bgp as-number   N/A 
3.  Specify the source interface 
for establishing TCP 
connections to a peer or peer 
group.  peer {
 group-name  | ip-address  } 
connect-interface  interface-type  
interface-number   By default, BGP uses the outbound 
interface of the best route to the BGP 
peer or peer group as the source 
interface for establishing a TCP 
connection to the peer or peer 
group. 
 
Allowing establishment of...

 205 
 
Step Command Remarks 
1.  Enter system view. 
system-view  N/A 
2.  Enter BGP view. 
bgp as-number   N/A 
3.  Inject a network to the BGP 
routing table.  network
 ip-address [ mask  | 
mask-length  ] route-policy 
route-policy-name   Optional. 
Not injected by default. 
 
Configuring BGP route redistribution 
BGP does not find routes by itself. Rather, it redistributes routing information in the local AS from other 
routing protocols. During route redistribution, you can configure BGP to filter...

 206 
Controlling route distribution and reception 
Configuration prerequisites 
BGP connections must be created. 
Configuring BGP route summarization 
To reduce the routing table size on medium and large BGP networks, you need to configure route 
summarization on BGP routers. BGP supports automatic and manual summarization modes. Manual 
summary routes have a higher priority than automatic ones. 
Configuring automatic route summarization 
After automatic route summarization is configured, BGP summarizes...

 207 
To advertise a default route to a peer or peer group:  
Step Command  Remarks 
1.  Enter system view. 
system-view  N/A 
2.  Enter BGP view. 
bgp as-number   N/A 
3.  Advertise a default route to a 
peer or peer group.  peer { group-name |
 ip-address } 
default-route-advertise  [ route-policy 
route-policy-name  ]  Not advertised by 
default. 
 
Configuring BGP route distribution/reception filtering policies 
Configuration prerequisites 
Configure following filters as needed: 
•
  ACL 
•   IP...

 208 
Step Command  Remarks 
3.  Configure BGP route 
distribution filtering 
policies. 
• Configure the filtering of 
redistributed routes: 
filter-policy  { acl-number  |  ip-prefix  
ip-prefix-name  }  export [ direct  | isis 
process-id  |  ospf  process-id  |  rip 
process-id  |  static  ] 
•  Reference a routing policy to filter 
advertisements to a peer or peer 
group: 
peer {  group-name  | ip-address  } 
route-policy  route-policy-name 
export 
•  Reference an ACL to filter 
advertisements to a...

 209 
Step Command  Remarks 
3.  Configure BGP route 
reception filtering 
policies. 
• Filter incoming routes with an ACL or 
IP prefix list: 
filter-policy  { acl-number  | ip-prefix  
ip-prefix-name  } import 
• Reference a routing policy to filter 
routes from a peer or peer group: 
peer { group-name  | ip-address  } 
route-policy  route-policy-name 
import 
•  Reference an ACL to filter routing 
information from a peer or peer 
group: 
peer { group-name  | ip-address  } 
filter-policy  acl-number...

 210 
Step Command Remarks 
3.  Configure the maximum 
number of prefixes allowed to 
be received from a peer or 
peer group. 
• Specify the maximum number 
of prefixes that can be received 
from a peer or peer group: 
peer { group-name  | 
ip-address } route-limit  
prefix-number 
[ percentage-value ] 
•  Specify the maximum number 
of prefixes that can be received 
from a peer or peer group: 
peer {  group-name  | 
ip-address } route-limit 
prefix-number  alert-only 
[ percentage-value ] 
•  Specify...

 211 
Step Command  Remarks 
3.  Configure a shortcut route.  network
 ip-address [ mask  | mask-length  ] 
short-cut  Optional. 
By default, an EBGP 
route received has a 
priority of 255. 
 
Configuring BGP route attributes 
Configuration prerequisites 
BGP connections must be created. 
Specifying a preferred value for routes received 
By default, routes received from a peer have a preferred value of 0. Among multiple routes that have the 
same destination and mask and are learned from diff
erent...