Add Arista prefix limits and tidy prefix limit documentation#122
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jwbensley wants to merge 2 commits intodenog:mainfrom
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Add Arista prefix limits and tidy prefix limit documentation#122jwbensley wants to merge 2 commits intodenog:mainfrom
jwbensley wants to merge 2 commits intodenog:mainfrom
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felbinger
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Apr 1, 2026
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Text looks good, just some nitpicks.
Didn't check config snippets.
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| This parameter is configured for each eBGP session and is the simplest and easiest security measure you can use. Unfortunately, many stop here. Please do not. | |||
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I know you didn't change this but "simplest and easiest" is kinda redundant. Maybe we can improve this.
| This parameter is configured for each eBGP session and is the simplest and easiest security measure you can use. Unfortunately, many stop here. Please do not. | ||
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| Maximum prefix defines a limit for the number of prefixes you accept from an eBGP peer. If the peer sends more, the eBGP session is shut down. Usually, routers keep the session down for some time, then it is automatically re-enabled. If the peer still sends more prefixes than allowed, it is shut down again. | ||
| Maximum prefixes defines a limit for the number of prefixes you accept from an eBGP peer. If the peer sends more, the eBGP session can be shut down or it can remain active but stop accepting new prefixes beyond the configured limit. Usually, routers keep the session down for some time and then it can be automatically re-enabled (in the case the peer has reduced the number of prefix they're advertising). If the peer still sends more prefixes than allowed, the session is automatically shut down again. If the timer to reactivate the BGP session is too low, the session continuously flaps, which is not good for network stability. Therefore some networks prefer to configure their devices not to automatically re-enable the session, but to require manual intervention. |
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(in the case the peer has reduced the number of prefixes they are advertising)
Sounds wrong. How about:
in case the peer has reduced
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Set it at least to ten times the normal number of prefixes your peer announces