From 73d7504a0b15d819bdf46913ad0a380ef441504a Mon Sep 17 00:00:00 2001 From: marciocloudflare Date: Tue, 19 Nov 2024 14:35:09 +0000 Subject: [PATCH 1/4] added note on time to withdraw and bgp --- .../magic-transit/how-to/advertise-prefixes.mdx | 14 +++++++++++--- 1 file changed, 11 insertions(+), 3 deletions(-) diff --git a/src/content/docs/magic-transit/how-to/advertise-prefixes.mdx b/src/content/docs/magic-transit/how-to/advertise-prefixes.mdx index fb267056432797..46445464c46c39 100644 --- a/src/content/docs/magic-transit/how-to/advertise-prefixes.mdx +++ b/src/content/docs/magic-transit/how-to/advertise-prefixes.mdx @@ -62,11 +62,15 @@ You can only delete a prefix with an **Unapproved** status. To delete prefixes w 1. From the **IP Prefixes** tab, locate the prefix you want to modify and select **Delete**. 2. Confirm your choice from the modal by selecting **Delete**. +:::note +When you withdraw a prefix, it takes a few minutes for the change to propagate around Cloudflare's global network. Although this should be a fairly quick process (around five minutes), Cloudflare has no control over how long ISPs refresh their routes. Be mindful of this whenever you announce or withdraw a prefix from your account, and plan accordingly. +::: + ## Border Gateway Protocol (BGP) control for advertisements -Use BGP to control the advertisement status of your prefix — advertised or withdrawn — from Cloudflare’s global network for on-demand deployment scenarios. BGP Control works by establishing BGP sessions to Cloudflare’s globally distributed Route Reflectors, which will initiate propagation of your prefix advertisement across Cloudflare's global network. +Use BGP to control the advertisement status of your prefix — advertised or withdrawn — from Cloudflare's global network for on-demand deployment scenarios. BGP Control works by establishing BGP sessions to Cloudflare's globally distributed Route Reflectors, which will initiate propagation of your prefix advertisement across Cloudflare's global network. -Prefixes can be advertised from Cloudflare’s network in a supported on-demand method such as BGP Control, or dynamically via the UI, API, or [Magic Network Monitoring](/magic-transit/magic-network-monitoring/). During the onboarding of your on-demand prefixes, please specify whether you want BGP-controlled advertisement or dynamic advertisement (via dashboard/API/Magic Network Monitoring). +Prefixes can be advertised from Cloudflare's network in a supported on-demand method such as BGP Control, or dynamically via the UI, API, or [Magic Network Monitoring](/magic-transit/magic-network-monitoring/). During the onboarding of your on-demand prefixes, please specify whether you want BGP-controlled advertisement or dynamic advertisement (via dashboard/API/Magic Network Monitoring). ![BGP diagram for Magic Transit](~/assets/images/magic-transit/bgp-diagram.png) @@ -78,9 +82,13 @@ To begin using BGP control, contact your account team with the following informa After receiving your information, Cloudflare will update firewall filters to establish the BGP session and provide you with the BGP endpoints to control your prefixes. +:::note +When you withdraw a prefix using BGP, you must withdraw the prefixes from all BGP sessions on all route reflectors. Otherwise, your prefix will not be withdrawn from Cloudflare's global network. +::: + ### Regional settings -Magic Transit requires static routing to steer traffic from Cloudflare’s network over one of your configured tunnel off-ramps (GRE, IPsec or CNI). Currently, advertisement of routes for traffic engineering purposes is not supported. As a best practice to reduce last-hop latency, you should consider scoping your routes regionally. The default setting for static route regions is **All Regions**. Refer to [Configure static routes](/magic-transit/how-to/configure-static-routes/) for more information. +Magic Transit requires static routing to steer traffic from Cloudflare's network over one of your configured tunnel off-ramps (GRE, IPsec or CNI). Currently, advertisement of routes for traffic engineering purposes is not supported. As a best practice to reduce last-hop latency, you should consider scoping your routes regionally. The default setting for static route regions is **All Regions**. Refer to [Configure static routes](/magic-transit/how-to/configure-static-routes/) for more information. ## Example router configurations From dac58858cadcaca522d237b5d52ab49d1fbd30dd Mon Sep 17 00:00:00 2001 From: marciocloudflare Date: Tue, 19 Nov 2024 14:36:42 +0000 Subject: [PATCH 2/4] refined text --- src/content/docs/magic-transit/how-to/advertise-prefixes.mdx | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/content/docs/magic-transit/how-to/advertise-prefixes.mdx b/src/content/docs/magic-transit/how-to/advertise-prefixes.mdx index 46445464c46c39..f756189d103dee 100644 --- a/src/content/docs/magic-transit/how-to/advertise-prefixes.mdx +++ b/src/content/docs/magic-transit/how-to/advertise-prefixes.mdx @@ -83,7 +83,7 @@ To begin using BGP control, contact your account team with the following informa After receiving your information, Cloudflare will update firewall filters to establish the BGP session and provide you with the BGP endpoints to control your prefixes. :::note -When you withdraw a prefix using BGP, you must withdraw the prefixes from all BGP sessions on all route reflectors. Otherwise, your prefix will not be withdrawn from Cloudflare's global network. +When you withdraw a prefix using BGP, you must ensure the prefix is withdrawn across all BGP sessions on all route reflectors. Otherwise, your prefix will not be withdrawn from Cloudflare's global network. ::: ### Regional settings From 4050a049d456f76a0f2eebef1bc5f59a27e754ca Mon Sep 17 00:00:00 2001 From: marciocloudflare Date: Tue, 19 Nov 2024 14:38:39 +0000 Subject: [PATCH 3/4] refined text --- src/content/docs/magic-transit/how-to/advertise-prefixes.mdx | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/content/docs/magic-transit/how-to/advertise-prefixes.mdx b/src/content/docs/magic-transit/how-to/advertise-prefixes.mdx index f756189d103dee..3cdbe173b34e32 100644 --- a/src/content/docs/magic-transit/how-to/advertise-prefixes.mdx +++ b/src/content/docs/magic-transit/how-to/advertise-prefixes.mdx @@ -63,7 +63,7 @@ You can only delete a prefix with an **Unapproved** status. To delete prefixes w 2. Confirm your choice from the modal by selecting **Delete**. :::note -When you withdraw a prefix, it takes a few minutes for the change to propagate around Cloudflare's global network. Although this should be a fairly quick process (around five minutes), Cloudflare has no control over how long ISPs refresh their routes. Be mindful of this whenever you announce or withdraw a prefix from your account, and plan accordingly. +When you withdraw a prefix, it takes a few minutes for the change to propagate across Cloudflare's global network. While this process is fairly quick (around five minutes), Cloudflare has no control over how long ISPs take to refresh their routes. Keep this in mind when announcing or withdrawing a prefix from your account, and plan accordingly. ::: ## Border Gateway Protocol (BGP) control for advertisements From a9dce4467b96c3d93d3a9480b2906f73081706b1 Mon Sep 17 00:00:00 2001 From: marciocloudflare Date: Tue, 19 Nov 2024 14:45:28 +0000 Subject: [PATCH 4/4] refined text --- src/content/docs/magic-transit/how-to/advertise-prefixes.mdx | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/content/docs/magic-transit/how-to/advertise-prefixes.mdx b/src/content/docs/magic-transit/how-to/advertise-prefixes.mdx index 3cdbe173b34e32..a5eab839be866a 100644 --- a/src/content/docs/magic-transit/how-to/advertise-prefixes.mdx +++ b/src/content/docs/magic-transit/how-to/advertise-prefixes.mdx @@ -63,7 +63,7 @@ You can only delete a prefix with an **Unapproved** status. To delete prefixes w 2. Confirm your choice from the modal by selecting **Delete**. :::note -When you withdraw a prefix, it takes a few minutes for the change to propagate across Cloudflare's global network. While this process is fairly quick (around five minutes), Cloudflare has no control over how long ISPs take to refresh their routes. Keep this in mind when announcing or withdrawing a prefix from your account, and plan accordingly. +Withdrawing a prefix should propagate across Cloudflare's global network almost instantly, with changes typically taking effect within a few minutes at most. However, Cloudflare has no control over how long ISPs take to refresh their routes. Keep this in mind when announcing or withdrawing a prefix from your account, and plan accordingly. ::: ## Border Gateway Protocol (BGP) control for advertisements