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  • 1.  Unable to ping L3 interfaces between an SRX and EX in the same VLAN

    Posted 08-07-2012 04:12

    Been working on this fairly straight forward case for 2

    days already, but cant seems to make any progress.

     

    Appreciate if some can shed some light  

     

    I have an EX that is trunk'ed to an SRX , on the vlans 'mgt' and 'guest wireless'. 

    There is a layer 3 interface configures on vlan 'mgt' on both the 

    SRX and the EX. 

     

    However i cant seems to ping the L3 iface on the srx from the ex and vice versa. 

    Can any one give me some pointers here ? 

     

     

    SRX240 ( ge-0/0/12) <--------->(ge-3/0/34) EX4200

     

    L3 on SRX 240 is '172.16.16.1/24'

    L3 on EX4200 is '172.16.16.29/24' 

     

    root@csw01# run ping 172.16.16.1 source 172.16.16.29 
    ping: bind: Can't assign requested address

     

    below are sample out put from the respective devices 

     

    thanks for reading 

    any help is most appreciated ! 

     

    >>>>>>>>>>>>>>>SRX240

    root@srx240-29LK# show interfaces ge-0/0/12 
    unit 0 {
        family ethernet-switching {
           vlan {
           members mgt;
       }
     }
    }

     

    root@srx240-29LK# show vlans mgt 
    vlan-id 101;
    l3-interface vlan.1;

     

    root@srx240-29LK# show interfaces vlan unit 1 
    family inet {
    address 172.16.16.1/24;
    }

     

    root@srx240-29LK# run show route

    inet.0: 13 destinations, 14 routes (13 active, 0 holddown, 0 hidden)
    + = Active Route, - = Last Active, * = Both

    0.0.0.0/0 *[Static/5] 11w6d 07:28:40
    > to 111.223.88.193 via ge-0/0/0.0
    111.223.88.192/28 *[Direct/0] 11w6d 07:28:40
    > via ge-0/0/0.0
    111.223.88.195/32 *[Local/0] 11w6d 07:28:49
    Local via ge-0/0/0.0
    172.16.16.0/24 *[Direct/0] 02:08:04
    > via vlan.1
    172.16.16.1/32 *[Local/0] 02:08:04
    Local via vlan.1
    172.31.31.0/30 *[Direct/0] 4d 23:12:13
    > via ae0.0
    172.31.31.1/32 *[Local/0] 4d 23:12:16
    Local via ae0.0
    192.168.10.0/24 *[Direct/0] 1d 08:13:31
    > via ge-0/0/14.0
    192.168.10.1/32 *[Local/0] 1w4d 03:48:51
    Local via ge-0/0/14.0
    192.168.41.0/24 *[Direct/0] 03:10:07
    > via ge-0/0/14.0
    192.168.41.1/32 *[Local/0] 03:10:07
    Local via ge-0/0/14.0
    192.168.64.0/24 *[Static/5] 4d 00:21:30
    > to 172.31.31.2 via ae0.0
    192.168.123.250/32 *[Direct/0] 11w6d 07:22:30
    > via ge-0/0/1.0
    [Local/0] 11w6d 07:22:35
    Local via ge-0/0/1.0

     

     

    >>>>>>>>EX4200

     

    root@csw01# show interfaces ge-0/0/43 
    unit 0 {
    family ethernet-switching;
    }

    {master:0}[edit]
    root@csw01# show interfaces ge-3/0/43 
    unit 0 {
    family ethernet-switching {
    port-mode trunk;
    vlan {
    members [ mgt guest-wireless ];
    }
    }
    }

    {master:0}[edit]
    root@csw01# show vlans mgt 
    vlan-id 101;
    interface {
    ge-0/0/47.0;
    }
    l3-interface vlan.0;

    {master:0}[edit]
    root@csw01# show interfaces vlan unit 0 
    family inet {
    address 172.16.16.29/24;
    }

    {master:0}[edit]
    root@csw01# run show route

    inet.0: 8 destinations, 8 routes (8 active, 0 holddown, 0 hidden)
    + = Active Route, - = Last Active, * = Both

    0.0.0.0/0 *[Static/5] 22:39:58
    > to 172.31.31.1 via ae8.0
    172.31.31.0/30 *[Direct/0] 22:39:58
    > via ae8.0
    172.31.31.2/32 *[Local/0] 22:39:58
    Local via ae8.0
    192.168.64.0/24 *[Direct/0] 22:39:58
    > via vlan.1
    192.168.64.1/32 *[Local/0] 22:39:58
    Local via vlan.1
    192.168.66.1/32 *[Local/0] 22:39:58
    Reject
    192.168.68.1/32 *[Local/0] 22:39:58
    Reject
    224.0.0.22/32 *[IGMP/0] 4w1d 01:07:32
    MultiRecv

    r1.inet.0: 2 destinations, 2 routes (2 active, 0 holddown, 0 hidden)
    + = Active Route, - = Last Active, * = Both

    172.16.16.0/24 *[Direct/0] 02:49:00
    > via vlan.0
    172.16.16.29/32 *[Local/0] 02:49:00
    Local via vlan.0

    {master:0}[edit]



  • 2.  RE: Unable to ping L3 interfaces between an SRX and EX in the same VLAN
    Best Answer

    Posted 08-07-2012 07:16

    Based on the configuration posted port ge-3/0/43 on the EX switch is set to trunk mode but port ge-0/0/12 on the SRX does not appear to be configured for trunk mode.  They need to match either set them both to trunk mode or both to access mode.



  • 3.  RE: Unable to ping L3 interfaces between an SRX and EX in the same VLAN

    Posted 08-07-2012 07:29

    Hi Jcoliazo,

    you 're right ! that seems to be what is causing the problem 

     

    Kudos to you man 



  • 4.  RE: Unable to ping L3 interfaces between an SRX and EX in the same VLAN

    Posted 08-07-2012 07:37

    Hi All,

    is it possible to configure an ethernet aggregated interface on the SRX and the EX, 

    and use them to trunk the VLANs instead of the ge-0/0/x ?

    I have known that to work between EX switches, but will it work between an SRX and a EX ? 

     

    Thanks in advance ! 

     

    Horly



  • 5.  RE: Unable to ping L3 interfaces between an SRX and EX in the same VLAN

    Posted 08-07-2012 11:01

    Take a look at this link for an SRX to EX LACP config: http://kb.juniper.net/InfoCenter/index?page=content&id=KB22474&actp=RSS

    As far as trunking goes it is the same as trunking on a physical interface.  Set the mode to trunk and add the VLANs as members (on the aggregated interface not the physical interfaces).