What you should know about BGP-4

BGP-4

What you should know about BGP-4 Protocol

Border Gateway Protocol Version 4 (BGP-4), documented in RFC 1771, is the current exterior routing protocol used for the global Internet. BGP is essentially a distance-vector algorithm, but with several added twists. Other BGP-related documents are RFC 1772 (BGP Application), RFC 1773 (BGP Experience), RFC 1774 (BGP Protocol Analysis), and RFC 1657 (BGP MIB).

BGP Labeled Unicast (BGP-LU)

Oct 17, 2018

This blog post discusses BGP Labeled Unicast (BGP-LU) which is used in multi-regional networks to carry the label information. While the RFC3107 “Carrying Label...

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BGP/MPLS Layer 3 VPNs Practical Configuration

Mar 21, 2018

In our previous blog article we’ve discussed the benefits and the fundamental principles of BGP/MPLS L3 VPNs. We have covered the definition of the...

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BGP / MPLS Layer 3 VPNs

Mar 13, 2018

What is VPN? Virtual Private Networks (VPN) are designed to provide users with the private networks capabilities over a shared infrastructure. They connect remote sites...

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Lesser-known BGP path attributes

Nov 5, 2015

The past few weeks we've discussed the main BGP path attributes: the next hop, the AS path, the MED. We also covered the community...

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The BGP Multi Exit Discriminator (MED) attribute and tie-breaking

Oct 28, 2015

When BGP needs to choose which route to reach a certain destination is best, it first looks at the local preference and AS path...

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Understanding the AS path and AS path prepending

Oct 19, 2015

In earlier articles, we discussed the next hop and local preference attributes. Today we'll be looking at the AS_PATH attribute as well as the...

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IPv4 BGP vs IPv6 BGP

Feb 6, 2015

BGP is older than IPv6. Even BGP-4, the version we still use today, predates IPv6: the first BGP-4 RFC (RFC 1654) was published in...

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