[j-nsp] OSPF case study... nbma between R3-R4..causing adjacency issues

[Hoogen]

Hi All,


For a good measure I checked the link ip address between 10.0.2.5 and
10.0.2.6 there is no netmask issues.... This is a requirement as stated in
OSPF case study in JNCIP book. To make the link between R3-R4 to have a DR
election... So i made it an nbma interface... which is now causing the
adjacency to break.....

I verified the hello packets by the interface detail command... it does show
up as 30 and 120 (h/D)... so no issues there...

Any help is greatly appreciated...


Interface configuration

R3
t1-1/0/0 {
    hold-time up 30 down 30;
    encapsulation frame-relay;
    lmi {
        n392dte 2;
        n393dte 3;
        t391dte 15;
        lmi-type itu;
    }
    unit 100 {
        bandwidth 155m;
        dlci 100;
        family inet {
            address 10.0.2.5/30;
        }
    }
}
#######
    area 0.0.0.0 {
        interface t1-1/0/0.100 {
            interface-type nbma;
            neighbor 10.0.2.6 eligible;
        }


R4

t1-1/0/0 {
    dce;
    hold-time up 30 down 30;
    encapsulation frame-relay;
    lmi {
        n392dce 2;
        n393dce 3;
        t392dce 25;
        lmi-type itu;
    }
    unit 100 {
        bandwidth 155m;
        dlci 100;
        family inet {
            address 10.0.2.6/30;
        }
    }
}

########

    area 0.0.0.0 {
        interface t1-1/0/0.100 {
            interface-type nbma;
            neighbor 10.0.2.5 eligible;
        }

Sep  9 17:07:54.604230 OSPF rcvd Hello 10.0.2.5 -> 10.0.2.6 (t1-1/0/0.100,
IFL 0x44)
Sep  9 17:07:54.604237   Version 2, length 44, ID 10.0.3.3, area 0.0.0.0
Sep  9 17:07:54.604242   checksum 0x0, authtype 0
Sep  9 17:07:54.604248   mask 255.255.255.252, hello_ivl 30, opts 0x2, prio
128
Sep  9 17:07:54.604253   dead_ivl 120, DR 0.0.0.0, BDR 0.0.0.0
*Sep  9 17:07:54.604259 OSPF packet ignored: netmask 255.255.255.252
mismatch from 10.0.2.5*

Did google... but nothing on what I might be doing wrong....
lab at R3#
*** ospf ***
Sep 9 17:29:42.537312 OSPF sent Hello -> 10.0.2.6 (t1-1/0/0.100, IFL 0x47)
Sep 9 17:29:42.538006 OSPF sent Hello 10.0.2.5 -> 10.0.2.6 (t1-1/0/0.100,
IFL 0x47)
Sep 9 17:29:45.656935 OSPF rcvd Hello 10.0.2.6 -> 10.0.2.5 (t1-1/0/0.100,
IFL 0x47)
*Sep 9 17:29:45.657005 OSPF packet ignored: netmask 255.255.255.252 mismatch
from 10.0.2.6*
Sep 9 17:29:46.556973 OSPF rcvd Hello 10.0.2.6 -> 10.0.2.5 (t1-1/0/0.100,
IFL 0x47)
Sep 9 17:29:46.557059 OSPF packet ignored: netmask 255.255.255.252 mismatch
from 10.0.2.6
Sep 9 17:29:49.336728 OSPF 10.0.2.6 DBD cleanup complete
Sep 9 17:29:49.336765 OSPF sent Hello -> 10.0.2.6 (t1-1/0/0.100, IFL 0x47)
run monitor stop

[edit]
lab at R3#