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Dual ISP setup ( ISP 1 on DHCP and ISP 2 on static line )

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  • 1.  Dual ISP setup ( ISP 1 on DHCP and ISP 2 on static line )

    Posted 03-14-2015 00:57

    Dear All,

     

    It's been quite some time since I last used this forum, but the Juniper techsupport doesn't seems to have a clue 

    so maybe some kind soles can help me out here. 

     

    I have dual ISP setup here. 

     

    ISP1 is on ge-0/0/0 and is on DHCP 

    ISP 2 is on fe-0/0/4 and is on static 

     

    I would like users to continue to go via ge-0/0/0 for their web surfing traffic,

    which is working fine. 

     

    But fe-0/0/4 is simply not working. Meaning 

    I can ping the srx on ge-0/0/0 but no fe-0/0/4 from the Internet 

     

    Any idea wha am i missing here ? 

     

    Thanks in advance 🙂 

     

    Some configuration snippets

     

    pcadmin@ppfw01# show interfaces ge-0/0/0    

    unit 0 {

        family inet {

            dhcp;

        }

    }

     

    [edit]

    pcadmin@ppfw01# show interfaces fe-0/0/4

    unit 0 {

        family inet {

            filter {

                input filter-isp2;

            }

            address 101.127.222.50/28;

        }

    }

     

    pcadmin@ppfw01# show security zones security-zone Internet

    interfaces {

        ge-0/0/0.0 {

            host-inbound-traffic {

                system-services {

                    ping;

                    dhcp;

                    https;

                    ike;

                    ssh;

                }

            }

        }

        fe-0/0/4.0 {

            host-inbound-traffic {

                system-services {

                    ping;

                    ike;

                    ssh;

                }

            }

        }

    }

     

    pcadmin@ppfw01# show routing-options

    interface-routes {

        rib-group inet ribgrp1;

    }

    static {

        route 10.10.2.0/24 next-hop 10.10.253.2;

        route 10.10.1.0/27 next-hop 10.10.253.2;

        route 192.168.253.0/24 next-hop st0.0;

        route 0.0.0.0/0 {

            qualified-next-hop 101.127.222.49 {

                preference 20;

            }

        }

    }

    rib-groups {

        ribgrp1 {

            import-rib [ inet.0 ri-starhub.inet.0 ];

        }

    }

     

    [edit]

    pcadmin@ppfw01# show routing-instances

    ri-starhub {

        instance-type forwarding;

        routing-options {

            static {

                route 0.0.0.0/0 next-hop 101.127.222.49;

            }

        }

    }

     

     

    pcadmin@ppfw01# run show route | no-more

     

    inet.0: 17 destinations, 18 routes (17 active, 0 holddown, 0 hidden)

    + = Active Route, - = Last Active, * = Both

     

    0.0.0.0/0          *[Access-internal/12] 00:14:44

                        > to 118.200.173.254 via ge-0/0/0.0

                        [Static/20] 03:19:36

                        > to 101.127.222.49 via fe-0/0/4.0

     

    101.127.222.48/28  *[Direct/0] 2d 17:25:34

                        > via fe-0/0/4.0

    101.127.222.50/32  *[Local/0] 2d 17:31:21

                          Local via fe-0/0/4.0

    101.127.222.51/32  *[Static/1] 2d 05:16:45

                          Discard

    118.200.173.0/24   *[Direct/0] 2w4d 00:59:31

                        > via ge-0/0/0.0

    118.200.173.18/32  *[Local/0] 2w4d 00:59:31

                          Local via ge-0/0/0.0

     

    ri-starhub.inet.0: 13 destinations, 13 routes (13 active, 0 holddown, 0 hidden)

    + = Active Route, - = Last Active, * = Both

     

    0.0.0.0/0          *[Static/5] 03:39:33

                        > to 101.127.222.49 via fe-0/0/4.0

    101.127.222.48/28  *[Direct/0] 03:39:34

                        > via fe-0/0/4.0

    101.127.222.50/32  *[Local/0] 03:39:34

                          Local via fe-0/0/4.0

    118.200.173.0/24   *[Direct/0] 03:39:34

                        > via ge-0/0/0.0

    118.200.173.18/32  *[Local/0] 03:39:34

                          Local via ge-0/0/0.0

     

    [edit]

     



  • 2.  RE: Dual ISP setup ( ISP 1 on DHCP and ISP 2 on static line )
    Best Answer

     
    Posted 03-14-2015 02:18

    HI,

     

    what I see in the snippets you have pasted, I see that you have in your inet.0 routing table

     

    0.0.0.0/0          *[Access-internal/12] 00:14:44

                        > to 118.200.173.254 via ge-0/0/0.0

                        [Static/20] 03:19:36

                        > to 101.127.222.49 via fe-0/0/4.0

     

    you have a default route towards 118.200.173.254, with a qualified next-hop of 101.127.222.49.  This means that the

    default always goes towards the 118.x.x.x ip as gateway. Only when this interface goed down the default will go over the fe/0/04.0 interface and your srx will be available on that ip on the "Internet"

     

    What you could do is configure some routing-instances as virtual routers. Have a look at this url It gives a config sample and some details.

     

    http://pastebin.com/fQvNfMQR

     

     

    Hope this helps you a bit

     

     



  • 3.  RE: Dual ISP setup ( ISP 1 on DHCP and ISP 2 on static line )

    Posted 03-15-2015 23:34

    Dear Marc, 

    I have taken a look at the article reference in your link. 

    Incidentally it's almost identical to the following KB from juniper 

    http://kb.juniper.net/InfoCenter/index?page=content&id=KB15545&smlogin=true

     

    I find it to be an over kill for my scenario which is just to get the iface on the 2nd ISP 

    to work. 

    At any rate I have taking your suggest of creating another routing instance which owns 

    ISP2 and the DMZ interface. So that works and will have to mark answer as the soln.

     

    But now I have problem with the next requirment which is use ISP2 as the 

    the failover for the Trust zone. ( users and internal servers ) via this KB 

     

    http://kb.juniper.net/InfoCenter/index?page=content&id=KB22052&cat=JUNOS&actp=LIST&smlogin=true

     

    Is there any way to specify the ISP2 's gateway or the new virtual routing instance (who owns ISP2 interface )  as the next hop or next table 

    from the service ip-monitoring service ? 

     

    Rgds

    Dakuan 

     

     



  • 4.  RE: Dual ISP setup ( ISP 1 on DHCP and ISP 2 on static line )

     
    Posted 03-16-2015 05:10

    see my post at your other topic