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Copy file name to clipboardExpand all lines: content/cumulus-linux-516/Layer-3/Border-Gateway-Protocol-BGP/Optional-BGP-Configuration.md
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@@ -1749,11 +1749,11 @@ To configure BGP unreachability SAFI:
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- Optional on both leaf and spine: Set the prefix limits for a peer or peer group; see the table below.
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- Optional on both leaf and spine: Set the AS path options for a peer or peer group; see the table below.
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The following table describes the `prefix limit` options.
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The following table describes the prefix limit options (`prefix-limits inbound`).
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| Option | Description |
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| -------- | ------------ |
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|`inbound maximum`| The maximum number of unreachability prefixes that the switch can receive from the peer or peer group. This is critical for security to prevent state exhaustion. |
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|`maximum`| The maximum number of unreachability prefixes that the switch can receive from the peer or peer group. This is critical for security to prevent state exhaustion. |
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|`reestablish-wait`| The time in minutes to wait before establishing the BGP session again with the peer or peer group. You can specify a value between 1 and 65535, or `auto`. The default value is `auto`, which uses standard BGP timers and processing. |
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|`warning-only`| When enabled, the switch only generates a syslog warning if the number of received unreachability prefixes exceeds the limit. |
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|`warning-threshold`| The percentage of the maximum at which a syslog warning is generated. You can specify a value between 1 and 100. The default value is 75.|
Copy file name to clipboardExpand all lines: content/cumulus-linux-517/Layer-3/Border-Gateway-Protocol-BGP/Optional-BGP-Configuration.md
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@@ -1749,11 +1749,11 @@ To configure BGP unreachability SAFI:
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- Optional on both leaf and spine: Set the prefix limits for a peer or peer group; see the table below.
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- Optional on both leaf and spine: Set the AS path options for a peer or peer group; see the table below.
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The following table describes the `prefix limit` options.
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The following table describes the prefix limits options (`prefix-limits inbound`).
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| Option | Description |
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| -------- | ------------ |
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|`inbound maximum`| The maximum number of unreachability prefixes that the switch can receive from the peer or peer group. This is critical for security to prevent state exhaustion. |
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|`maximum`| The maximum number of unreachability prefixes that the switch can receive from the peer or peer group. This is critical for security to prevent state exhaustion. |
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|`reestablish-wait`| The time in minutes to wait before establishing the BGP session again with the peer or peer group. You can specify a value between 1 and 65535, or `auto`. The default value is `auto`, which uses standard BGP timers and processing. |
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|`warning-only`| When enabled, the switch only generates a syslog warning if the number of received unreachability prefixes exceeds the limit. |
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|`warning-threshold`| The percentage of the maximum at which a syslog warning is generated. You can specify a value between 1 and 100. The default value is 75.|
## <h>nv set vrf \<vrf-id\> router bgp neighbor \<neighbor-id\> address-family ipv4-unreachability prefix-limits maximum </h>
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## <h>nv set vrf \<vrf-id\> router bgp neighbor \<neighbor-id\> address-family ipv4-unreachability prefix-limits inbound maximum </h>
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Configures the maximum number of BGP unreachability SAFI IPv4 prefixes that can be received from the peer. This is CRITICAL for security to prevent state exhaustion.
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### Example
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```
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cumulus@switch:~$ nv set vrf default router bgp neighbor swp51 address-family ipv4-unreachability prefix-limits maximum 6
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cumulus@switch:~$ nv set vrf default router bgp neighbor swp51 address-family ipv4-unreachability prefix-limits inbound maximum 6
Configures the time in minutes to wait before establishing the BGP session again with the peer for BGP unreachability SAFI. The default value is `auto`, which uses standard BGP timers and processing.
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Configures the switch to only generate a warning syslog if the number of received BGP unreachability SAFI prefixes exceeds the limit, but does not bring down the BGP session. You can set this option to `enabled` or `disabled`.
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Configures the prefix limits for a neighbor for BGP unreachability SAFI (failure signaling). Sets the percentage of the maximum at which a syslog warning is generated. You can set the value between 1 and 100. The default value is 75.
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