https://www.sprint.net/lg/lg_start.php

http://packetlife.net/blog/2008/sep/19/bgp-route-aggregation-part-1

BGP: Aggregate address

https://networklessons.com/cisco/ccie-routing-switching-written/bgp-aggregate-as-set

show ip bgp neighbors IP-address routes

For example

show ip bgp neighbors 172.20.20.10 routes

https://en.wikipedia.org/wiki/Anycast

IPv4 BGP vs IPv6 BGP

https://majornetwork.net/2013/04/configuring-bgp-sessions-in-ipv6

Notes

1 : Enbale Ip V6 Routing  by command

ipv6 unicast-routing

2: address-family V6 enbale nieghbor

For example 

address-family ipv6 unicast
neighbor 2001:db8:c0f:fee::6:5500 activate
Nieghbor enbale on IPv6 family 

and disbale On ip V4 family

address-family ipv4
no neighbor 2001:DB8:C0F:FEE::6:5500 activate

For see  Prefix adv bgp IPV6

show ip bgp ipv6 unicast

For see Neighbor

show ip bgp all summary 


Filter same IPV4 prefix-list and assign to neighbor IN or OUT Rule

https://networklessons.com/bgp/bgp-community-local-as

https://supportforums.cisco.com/t5/wan-routing-and-switching/diff-between-no-export-and-local-as/td-p/798228

https://www.ripe.net/manage-ips-and-asns/resource-management/certification/bgp-origin-validation

http://rpki.me/quality.html

https://m.youtube.com/watch?v=I3Owb0u8Wuk

https://www.ripe.net/manage-ips-and-asns/resource-management/certification/resource-certification-roa-management#—creating-and-editing-roas

https://labs.ripe.net/Members/AlexBand/using-the-maximum-length-option-in-roas

mikroitk

https://forum.mikrotik.com/viewtopic.php?t=91377

Cisco

https://supportforums.cisco.com/t5/other-network-infrastructure/how-to-advertise-the-ibgp-learned-routes-to-another-ibgp-peer/td-p/312277

http://www.networkuser.ir/%D9%BE%D8%B1%D9%88%D8%AA%DA%A9%D9%84-%D9%87%D8%A7%DB%8C-%D9%85%D8%B3%DB%8C%D8%B1%DB%8C%D8%A7%D8%A8%DB%8C-calssful-vs-classless/

https://learningnetwork.cisco.com/thread/103937