Routing

Hello Fellow Peers.

I am need of some assistance. We have 3 ISP's that wwe BGP Peer with. ISP 1, is a 10Gb Peer, and has been running good for the past few years, but now they are having issues. Change of Ownership / Personnel, etc...

While we would like to maintain the BGP Peer with ISP 1, we would like to have the bulk of the traffic go out ISP 2. ISP 2 is also a 10Gb BGP Peer.

We have tried using the preference statement, but not seeing any real changes in traffic.

We have also tried to pre-pend the ASN on ISP 1 to make it the undesirable path, but that seemed to have no effect as well.

I have included the protocols config of the router for BGP.

Any assistance would be appreciated.

protocols {
    bgp {
        group internal {
            type internal;
            export next-hop-self;
            neighbor X.X.X.254;
        }
        group internet-peers {
            type external;
            family inet {
                unicast;
                multicast;
            }
            peer-as XXXX4;
            multipath;
            neighbor X.X46.253 {
                description "ISP 3 - 5G";
                preference 173;
                export [ Adv-ISP-3 ];
                peer-as XXXX3;
            }
            neighbor X.X152.197 {
                description "ISP 2 - 10G";
                preference 170;
                export Adv-ISP-2;
                peer-as XXXX2;
            }
            neighbor X.X.216.137 {
                description "ISP 1 - 10G";
               preference 171;
                export Adv-ISP-1;
                peer-as XXXX1;
            }
        }
        advertise-inactive;
        log-updown;
    }
    ospf {
        area 0.0.0.0 {
            interface lo0.10 {
                passive;
            }
            interface xe-1/0/1.0 {
                authentication {
                    md5 0 key "$9$lmMM7Vji.QF/s2QFn/OBNdbw2a"; ## SECRET-DATA
                }
            }
            interface ge-0/1/5.0 {
                passive;
            }
            interface xe-0/2/1.0 {
                authentication {
                    md5 0 key "$9$lmMM7Vji.QF/s2QFn/OBNdbw2a"; ## SECRET-DATA
                }
            }
            interface ge-0/0/5.0 {
                passive;
            }
            interface ge-0/1/0.0 {
                passive;
            }
        }
        export redist-default;
        reference-bandwidth 10g;
    }
}

Thank You

Hello,

For outgoing traffic ( upload ) you can increase ISP2 or ISP3 local-preference by adding import policy.

For incoming traffic ( download ) AS prepending should work.  Please send your policy configuration. 

Hello Fellow Peers.

I am need of some assistance. We have 3 ISP's that wwe BGP Peer with. ISP 1, is a 10Gb Peer, and has been running good for the past few years, but now they are having issues. Change of Ownership / Personnel, etc...

While we would like to maintain the BGP Peer with ISP 1, we would like to have the bulk of the traffic go out ISP 2. ISP 2 is also a 10Gb BGP Peer.

We have tried using the preference statement, but not seeing any real changes in traffic.

We have also tried to pre-pend the ASN on ISP 1 to make it the undesirable path, but that seemed to have no effect as well.

I have included the protocols config of the router for BGP.

Any assistance would be appreciated.

protocols {
    bgp {
        group internal {
            type internal;
            export next-hop-self;
            neighbor X.X.X.254;
        }
        group internet-peers {
            type external;
            family inet {
                unicast;
                multicast;
            }
            peer-as XXXX4;
            multipath;
            neighbor X.X46.253 {
                description "ISP 3 - 5G";
                preference 173;
                export [ Adv-ISP-3 ];
                peer-as XXXX3;
            }
            neighbor X.X152.197 {
                description "ISP 2 - 10G";
                preference 170;
                export Adv-ISP-2;
                peer-as XXXX2;
            }
            neighbor X.X.216.137 {
                description "ISP 1 - 10G";
               preference 171;
                export Adv-ISP-1;
                peer-as XXXX1;
            }
        }
        advertise-inactive;
        log-updown;
    }
    ospf {
        area 0.0.0.0 {
            interface lo0.10 {
                passive;
            }
            interface xe-1/0/1.0 {
                authentication {
                    md5 0 key "$9$lmMM7Vji.QF/s2QFn/OBNdbw2a"; ## SECRET-DATA
                }
            }
            interface ge-0/1/5.0 {
                passive;
            }
            interface xe-0/2/1.0 {
                authentication {
                    md5 0 key "$9$lmMM7Vji.QF/s2QFn/OBNdbw2a"; ## SECRET-DATA
                }
            }
            interface ge-0/0/5.0 {
                passive;
            }
            interface ge-0/1/0.0 {
                passive;
            }
        }
        export redist-default;
        reference-bandwidth 10g;
    }
}

Thank You

Hello,

I have included the policy configuration:
prefix-list Networks-ISP-1 {
    
    X.X.176.0/22;
    
    X.X.180.0/22;
    
    X.X.32.0/21;
    
    X.X.40.0/21;
    
    X.X.40.0/24;
    
    X.X.41.0/24;
    
    X.X.42.0/24;
    
    X.X.43.0/24;
    
    X.X.44.0/24;
    
    X.X.45.0/24;
}
prefix-list External-Networks-ISP-1 {
 
    X.X.64.0/24;
 
    X.X.110.0/24;
 
    X.X.78.120/30;
 
    X.X.110.0/24;
 
    X.X.153.0/24;
 
    X.X.251.0/24;
 
    X.X.254.0/24;
 
    X.X.46.0/24;
 
    X.X.47.0/24;
}
prefix-list Networks-ISP-2 {
 
    X.X.176.0/21;
    
    X.X.32.0/20;
    
    X.X.224.0/21;
    
    X.X.40.0/24;
    
    X.X.41.0/24;
    
    X.X.42.0/24;
    
    X.X.43.0/24;
    
    X.X.44.0/24;
    
    X.X.45.0/24;
}
prefix-list External-Networks-ISP-2 {
    
    X.X.64.0/24;
    
    X.X.110.0/24;
    
    X.X.78.120/30;
    
    X.X.110.0/24;
    
    X.X.153.0/24;
    
    X.X.251.0/24;
    
    X.X.254.0/24;
    
    X.X.46.0/24;
    
    X.X.47.0/24;
}
prefix-list Networks-ISP-3 {
 
    X.X.176.0/21;
    X.X.32.0/20;
 
    X.X.224.0/21;
 
    X.X.40.0/24;
 
    X.X.41.0/24;
 
    X.X.42.0/24;
 
    X.X.43.0/24;
 
    X.X.44.0/24;
 
    X.X.45.0/24;
    
    X.X.46.0/24;
    
    X.X.47.0/24;
}
prefix-list External-Networks-ISP-3 {
    
    X.X.64.0/24;
    
    X.X.110.0/24;
    
    X.X.78.120/30;
    
    X.X.110.0/24;
    
    X.X.153.0/24;
    
    X.X.251.0/24;
    
    X.X.254.0/24;
    
    X.X.46.0/24;
    
    X.X.47.0/24;
}
policy-statement AS-prepend-ISP-1 {
    from policy Adv-ISP-1;
    then {
        as-path-prepend "XXXX4 XXXX4 XXXX4 XXXX4";
        accept;
    }
}
policy-statement AS-prepend-ISP-3 {
    from policy Adv-ISP-3;
    then {
        as-path-prepend "XXXX4 XXXX4 XXXX4 XXXX4";
        accept;
    }
}
policy-statement Adv-ISP-1 {
    term 10 {
        from {
            protocol static;
            prefix-list-filter Networks-ISP-1 exact;
        }
        then accept;
    }
    term 15 {
        from {
            protocol bgp;
            prefix-list-filter External-Networks-ISP-1 exact;
        }
        then accept;
    }
    term 20 {
        then reject;
    }
}
policy-statement Adv-ISP-2 {
    term 10 {
        from {
            protocol static;
            prefix-list-filter Networks-ISP-2 exact;
        }
        then accept;
    }
    term 15 {
        from {
            protocol bgp;
            prefix-list-filter External-Networks-ISP-2 exact;
        }
        then accept;
    }
    term 20 {
        then reject;
    }
}
policy-statement Adv-ISP-3 {
    term 10 {
        from {
            protocol static;
            prefix-list-filter Networks-ISP-3 exact;
        }
        then accept;
    }
    term 15 {
        from {
            protocol bgp;
            prefix-list-filter External-Networks-ISP-3 exact;
        }
        then accept;
    }
    term 20 {
        then reject;
    }
}
policy-statement next-hop-self {
    then {
        next-hop self;
    }
}
policy-statement preference {
    term ISP-1 {
        from {
            protocol bgp;
            next-hop X.X.216.137;
        }
        then {
            preference 10;
        }
    }
    term ISP-2 {
        from {
            protocol bgp;
            next-hop X.X.152.197;
        }
        then {
            preference 15;
        }
    }
    term ISP-3 {
        from {
            protocol bgp;
            next-hop X.X.46.253;
        }
        then {
            preference 20;
        }
    }
}
policy-statement redist-default {
    from {
        protocol static;
        route-filter 0.0.0.0/0 exact;
    }
    then accept;
}

Hello,

For outgoing traffic ( upload ) you can increase ISP2 or ISP3 local-preference by adding import policy.

For incoming traffic ( download ) AS prepending should work.  Please send your policy configuration. 

Hello Fellow Peers.

I am need of some assistance. We have 3 ISP's that wwe BGP Peer with. ISP 1, is a 10Gb Peer, and has been running good for the past few years, but now they are having issues. Change of Ownership / Personnel, etc...

While we would like to maintain the BGP Peer with ISP 1, we would like to have the bulk of the traffic go out ISP 2. ISP 2 is also a 10Gb BGP Peer.

We have tried using the preference statement, but not seeing any real changes in traffic.

We have also tried to pre-pend the ASN on ISP 1 to make it the undesirable path, but that seemed to have no effect as well.

I have included the protocols config of the router for BGP.

Any assistance would be appreciated.

protocols {
    bgp {
        group internal {
            type internal;
            export next-hop-self;
            neighbor X.X.X.254;
        }
        group internet-peers {
            type external;
            family inet {
                unicast;
                multicast;
            }
            peer-as XXXX4;
            multipath;
            neighbor X.X46.253 {
                description "ISP 3 - 5G";
                preference 173;
                export [ Adv-ISP-3 ];
                peer-as XXXX3;
            }
            neighbor X.X152.197 {
                description "ISP 2 - 10G";
                preference 170;
                export Adv-ISP-2;
                peer-as XXXX2;
            }
            neighbor X.X.216.137 {
                description "ISP 1 - 10G";
               preference 171;
                export Adv-ISP-1;
                peer-as XXXX1;
            }
        }
        advertise-inactive;
        log-updown;
    }
    ospf {
        area 0.0.0.0 {
            interface lo0.10 {
                passive;
            }
            interface xe-1/0/1.0 {
                authentication {
                    md5 0 key "$9$lmMM7Vji.QF/s2QFn/OBNdbw2a"; ## SECRET-DATA
                }
            }
            interface ge-0/1/5.0 {
                passive;
            }
            interface xe-0/2/1.0 {
                authentication {
                    md5 0 key "$9$lmMM7Vji.QF/s2QFn/OBNdbw2a"; ## SECRET-DATA
                }
            }
            interface ge-0/0/5.0 {
                passive;
            }
            interface ge-0/1/0.0 {
                passive;
            }
        }
        export redist-default;
        reference-bandwidth 10g;
    }
}

Thank You