No relevant resource is found in the selected language.

This site uses cookies. By continuing to browse the site you are agreeing to our use of cookies. Read our privacy policy>Search

Reminder

To have a better experience, please upgrade your IE browser.

upgrade

CLI-based Configuration Guide - IP Unicast Routing

AR100, AR120, AR150, AR160, AR200, AR1200, AR2200, AR3200, and AR3600 V200R009

Rate and give feedback:
Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
Configuring the Dynamic BGP Peer Function

Configuring the Dynamic BGP Peer Function

Usage Scenario

If static BGP peers change frequently, the local device needs to add or delete BGP peer configurations in response to each change, which requires a heavy maintenance workload. To address this problem, configure the dynamic BGP peer function, which allows BGP to listen to BGP connection requests from a specified network segment, establish BGP peer relationships dynamically, and add the peers to a peer group. This spares the local device from adding or deleting BGP peer configurations in response to each change in the peer number, which reduces the maintenance workload.

Pre-configuration Tasks

Before configuring the dynamic BGP peer function, configure basic BGP functions.

Procedure

  1. Run system-view

    The system view is displayed.

  2. Run bgp { as-number-plain | as-number-dot }

    The BGP view is displayed.

  3. (Optional) Run bgp dynamic-session-limit limit-value

    The maximum number of dynamic BGP peer sessions is configured.

    If a large number of dynamic BGP peer sessions are established on the network segment, excessive system resources will be consumed. To prevent this problem, configure a maximum number for dynamic BGP peer sessions as required.

    By default, the maximum number of dynamic BGP peer sessions is half of the total specification.

  4. (Optional) Run ipv4-family vpn-instance vpn-instance-name

    The BGP-VPN instance IPv4 address family view is displayed.

    Perform this step if you need to configure the dynamic BGP peer function in the BGP-VPN instance IPv4 address family view in a BGP/MPLS IP VPN scenario.

  5. Run group group-name [ external | internal ]

    A BGP peer group is created.

    Configure the following parameters as required:

    • If the local device and its peers reside in the same AS, configure internal to create an IBGP peer group.

    • If the local device and its peers reside in different ASs, configure external to create an EBGP peer group.

    If neither internal nor external is configured, an IBGP peer group is created by default.

  6. Run peer group-name listen-net network { mask | mask-length }

    BGP is configured to listen to BGP connection requests from a specified network segment and establish BGP peer relationships dynamically.

    If you run the command multiple times, BGP listens to BGP connection requests from multiple network segments.

  7. Run peer group-name as-number { as-number-plain | as-number-dot } [ optional-as { optional-as-number-plain | optional-as-number-dot } &<1-5> ]

    An AS number is configured for the peer group.

    Configure the following parameters as required:

    • If the dynamic peers in the peer group reside in the same AS, configure { as-number-plain | as-number-dot } to set a fixed AS number.

    • If the dynamic peers in the peer group may reside in different ASs, in addition to a fixed AS number, you need to configure optional-as { optional-as-number-plain | optional-as-number-dot } &<1-5> to set an optional AS number. A maximum of five optional AS numbers can be set.

Verifying the Configuration

After configuring the dynamic BGP peer function, check the configuration.
  • Run the display bgp [ vpnv4 { all | vpn-instance vpn-instance-name } ] peer [ [ ipv4-address ] verbose ] command to check BGP peer information.
  • Run the display bgp [ vpnv4 { all | vpn-instance vpn-instance-name } ] group [ group-name ] command to check BGP peer group information.

# Display BGP peer information. The command output shows dynamic peer information.

<Huawei> display bgp peer
 Status codes: * - Dynamic
 BGP local router ID : 1.2.3.4
 Local AS number : 10
 Total number of peers : 2                 Peers in established state : 1
 Total number of dynamic peers : 1
  Peer             V    AS  MsgRcvd  MsgSent  OutQ  Up/Down       State PrefRcv

  1.1.1.1          4   100        0        0     0 00:00:07        Idle       0
 *1.2.5.6          4   200       32       35     0 00:17:49 Established       0

# Display BGP peer group information. The command output shows dynamic peer information and the network segment from which BGP listens to BGP connection requests.

<Huawei> display bgp group my-peer
 BGP peer-group: my-peer
 Remote AS: 100
         listen-net: 10.1.1.0 24
      
 Authentication type configured: None
 Group's BFD has been enabled
 Type : internal
 Maximum allowed route limit: 100
 Threshold: 75%
 Configured hold timer value: 180
 Keepalive timer value: 60
 Connect-retry timer value: 32
 Minimum route advertisement interval is 15 seconds
 PeerSession Members:
   10.1.1.2
         Status codes: * - Dynamic
      
 Peer Preferred Value: 0
 No routing policy is configured
 Peer Members:
  Peer            V          AS  MsgRcvd  MsgSent  OutQ  Up/Down       State PrefRcv
 *10.1.1.2        4         100       35       42     0 00:29:01 Established  0  
Translation
Download
Updated: 2019-05-17

Document ID: EDOC1000174069

Views: 123464

Downloads: 269

Average rating:
This Document Applies to these Products
Related Documents
Related Version
Share
Previous Next