reset bgp flap-info
Format
reset bgp [ vpn-instance vpn-instance-name ipv4-family ] flap-info [ as-path-filter { as-path-filter-number | as-path-filter-name } | network-address [ mask | mask-length ] | regexp as-path-regexp ]
reset bgp { ipv6 | vpn-instance vpn-instance-name ipv6-family } flap-info [ as-path-filter { as-path-filter-number | as-path-filter-name } | network-ipv6-address prefix-length | regexp as-path-regexp ]
reset bgp [ vpn-instance vpn-instance-name ipv4-family ] ipv4-address flap-info
reset bgp { ipv6 | vpn-instance vpn-instance-name ipv6-family } ipv6-address flap-info
reset bgp vpnv4 flap-info [ regexp as-path-regexp | as-path-filter { as-path-filter-number | as-path-filter-name } | ipv4-address [ mask | mask-length ] ] (supported only by the S5720-EI, S5720-HI, S5730-HI, S5731-H, S5731S-H, S5732-H, S6720-EI, S6720-HI, S6720S-EI, S6730S-H, and S6730-H)
reset bgp vpnv4 ipv4-address flap-info (supported only by the S5720-EI, S5720-HI, S5730-HI, S5731-H, S5731S-H, S5732-H, S6720-EI, S6720-HI, S6720S-EI, S6730S-H, and S6730-H)
The vpn-instance vpn-instance-name ipv6-family is only supported on S5720-EI, S5720-HI, S5730-HI, S5731-H, S5731-S, S5731S-H, S5731S-S, S5732-H, S6720-EI, S6720-HI, S6720S-EI, S6730-H, S6730S-H, S6730-S, and S6730S-S.
Parameters
| Parameter | Description | Value |
|---|---|---|
vpn-instance vpn-instance-name ipv4-family |
Clears the route flapping information of a specified VPN instance enabled with an IPv4 address family. |
The value must be an existing VPN instance name. |
as-path-filter as-path-filter-number |
Clears route flapping statistics based on the number of a specified AS_Path filter. |
It is an integer that ranges from 1 to 256. |
as-path-filter as-path-filter-name |
Clears route flapping statistics based on the name of a specified AS_Path filter. |
The value of as-path-filter-name is a string of 1 to 51 case-sensitive characters. NOTE:
When double quotation marks are used around the string, spaces are allowed in the string. |
network-address |
Specifies the IPv4 prefix address that is used to filter the BGP IPv4 routes. |
It is in dotted decimal notation. |
mask |
Specifies the network mask that is used to filter the BGP IPv4 routes. If neither the mask nor the mask length is specified, the address is processed as a classful address. |
It is in dotted decimal notation. |
mask-length |
Specifies the network mask length that is used to filter the BGP IPv4 routes. If neither the mask nor the mask length is specified, the address is processed as a classful address. |
The value is an integer that ranges from 0 to 32. |
regexp as-path-regexp |
Clears statistics about the flapping routes that match the AS_Path regular expression. |
- |
ipv6 |
Clears the route flapping statistics on all IPv6 peers. |
- |
vpn-instance vpn-instance-name ipv6-family |
Clears the route flapping information of a specified VPN instance enabled with an IPv6 address family. |
The value must be an existing VPN instance name. |
network-ipv6-address |
Specifies the IPv6 prefix address that is used to filter the BGP IPv6 routes. |
The value is a 32-digit hexadecimal number, in the format of X:X:X:X:X:X:X:X. |
prefix-length |
Specifies the network mask length that is used to filter the BGP IPv6 routes. |
The value is an integer that ranges from 0 to 128. |
ipv4-address |
Specifies the network address of an IPv4 peer. |
It is in dotted decimal notation. |
ipv6-address |
Specifies the network address of an IPv6 peer. |
The value is a 32-digit hexadecimal number, in the format of X:X:X:X:X:X:X:X. |
vpnv4 |
Resets route flapping statistics of BGP VPNv4 routes. |
- |
Usage Guidelines
Usage Scenario
The process of adding a route to and then deleting the route from a routing table is called route flapping.
When route flapping occurs, the routing protocol sends Update packets to neighbors. The neighbors that receive the Update packets need to recalculate routes and modify the routing table. Therefore, frequent route flapping consumes great bandwidth and CPU resources and even seriously affects network operations.
The reset bgp flap-info command is used to clear the flapping information about routes. This allows the switch to re-collect statistics about flapping routes and helps to monitor route changes and locate network problems.
Prerequisites
You can use display bgp routing-table flap-info command to view the information about BGP route flapping.
If there are a large number of flapping routes, define an AS_Path filter or an AS_Path regular expression to be referenced in the reset bgp flap-info command. The flapping statistics of the routes matching the AS_Path filter or the AS_Path regular expression are then cleared.
Precautions
After the reset bgp flap-info command is run, the flapping statistics of routes are reset and cannot be displayed.
Follow-up Procedure
After the flapping statistics of routes are cleared, run the display bgp routing-table flap-info command again to display the flapping statistics about BGP routes in order to locate problems.