Difference between revisions of "OSPF JUNOS"

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</source>
 
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=Tuning af OSPF=
 +
==Passiv interfaces==
 
=Referencer=
 
=Referencer=
 
<references/>
 
<references/>

Revision as of 17:48, 16 October 2014

Konfigurations eksemplet for OSPF konfigureres på dette setup. Det kører allerede RIP og vi skal nu tilføje OSPF og når OSPF har konvergeret erstatter vi RIP med OSPF i route tabellen

Konfigurations rækkefælgen bliver:

  1. Konfigurer OSPF
  2. Verificer OSPF
  3. Fjern RIP.

Konfiguration af OSPF

Her konfigureres OSPF så forbindelserne imellem routerne tilhører Area 0 og Lo interfaces tilhører et Area med samme nummer som P-Routeren(P1 = Area 1)
Route Preference konfigureres til at være højere end RIP, så vi ikke mister routing imens OSPF konvergerer. 

[edit routing-instances P1]
rael@SRX240# <input>show</input> 
routing-options {
    router-id 10.1.0.1;
}
protocols {
    ospf {
        preference 101;
        external-preference 105;
        area 0.0.0.0 {
            interface lt-0/0/0.1;
            interface lt-0/0/0.10;
        }
        area 0.0.0.1 {
            interface lo0.1;
        }
    }
}

Verificer OSPF

OSPF status 

[edit]
rael@SRX240# <input>run show ospf overview instance P1</input>
Instance: P1
  <notice>Router ID: 10.1.0.1</notice>
  Route table index: 5
  Area border router
  LSA refresh time: 50 minutes
  Area: 0.0.0.0
    Stub type: Not Stub
    Authentication Type: None
    Area border routers: 3, AS boundary routers: 0
    Neighbors
      <notice>Up (in full state): 2</notice>
  Area: 0.0.0.1
    Stub type: Not Stub
    Authentication Type: None
    Area border routers: 0, AS boundary routers: 0
    Neighbors
      Up (in full state): 0
  Topology: default (ID 0)
    Prefix export count: 0
    Full SPF runs: 15
    SPF delay: 0.200000 sec, SPF holddown: 5 sec, SPF rapid runs: 3
    Backup SPF: Not Needed

Show ospf database for P1 

[edit]
rael@SRX240# <input>run show ospf database instance P1</input>

    OSPF database, Area 0.0.0.0
 Type       ID               Adv Rtr           Seq      Age  Opt  Cksum  Len
<notice>Router  *10.1.0.1         10.1.0.1         0x8000000c    62  0x22 0x922e  48
Router   10.2.0.1         10.2.0.1         0x8000000a    63  0x22 0xcbfb  48
Router   10.3.0.1         10.3.0.1         0x80000009    64  0x22 0x7b2d  48
Router   10.4.0.1         10.4.0.1         0x8000000a    65  0x22 0xc6e5  48</notice>
Network  10.0.0.2         10.2.0.1         0x80000005    63  0x22 0x679f  32
Network  10.0.0.6         10.4.0.1         0x80000006    69  0x22 0x49b3  32
Network  10.0.0.9         10.3.0.1         0x80000004    69  0x22 0x23db  32
Network  10.0.0.13        10.4.0.1         0x80000003    65  0x22 0x15e2  32
Summary *10.1.0.0         10.1.0.1         0x80000003   673  0x22 0x8e95  28
Summary *10.1.0.1         10.1.0.1         0x80000003   476  0x22 0x849e  28
Summary  10.2.0.0         10.2.0.1         0x80000003   687  0x22 0x7aa7  28
Summary  10.2.0.1         10.2.0.1         0x80000003   503  0x22 0x70b0  28
Summary  10.3.0.0         10.3.0.1         0x80000003   687  0x22 0x66b9  28
Summary  10.3.0.1         10.3.0.1         0x80000003   503  0x22 0x5cc2  28
Summary  10.4.0.0         10.4.0.1         0x80000003   699  0x22 0x52cb  28
Summary  10.4.0.1         10.4.0.1         0x80000003   527  0x22 0x48d4  28

    OSPF database, Area 0.0.0.1
 Type       ID               Adv Rtr           Seq      Age  Opt  Cksum  Len
Router  *10.1.0.1         10.1.0.1         0x80000004   124  0x22 0x7f70  48
Summary *10.0.0.0         10.1.0.1         0x80000006    58  0x22 0x8c97  28
Summary *10.0.0.4         10.1.0.1         0x80000003    58  0x22 0x74ad  28
Summary *10.0.0.8         10.1.0.1         0x80000007    68  0x22 0x3ae0  28
Summary *10.0.0.12        10.1.0.1         0x80000005    63  0x22 0x20f7  28
Summary *10.2.0.0         10.1.0.1         0x80000003    58  0x22 0x8c95  28
Summary *10.2.0.1         10.1.0.1         0x80000003    58  0x22 0x829e  28
Summary *10.3.0.0         10.1.0.1         0x80000004    67  0x22 0x7ea1  28
Summary *10.3.0.1         10.1.0.1         0x80000004    67  0x22 0x74aa  28
Summary *10.4.0.0         10.1.0.1         0x80000005    58  0x22 0x7aa2  28
Summary *10.4.0.1         10.1.0.1         0x80000005    58  0x22 0x70ab  28

Nabo tabellen for P1: 

[edit]
rael@SRX240# <input>run show ospf neighbor instance P1</input>
Address          Interface              State     ID               Pri  Dead
10.0.0.2         lt-0/0/0.1             Full      10.2.0.1         128    35
10.0.0.9         lt-0/0/0.10            Full      10.3.0.1         128    32

Statistikker for OSPF 

[edit]
rael@SRX240# <input>run show ospf statistics instance P1</input>

Packet type             Total                  Last 5 seconds
                   Sent      Received        Sent      Received
   Hello             36            28           0             0
     DbD             25            20           0             0
   LSReq              5             3           0             0
LSUpdate             54            44           0             0
   LSAck             37            32           0             0

DBDs retransmitted     :                    9, last 5 seconds :          0
LSAs flooded           :                   33, last 5 seconds :          0
LSAs flooded high-prio :                   22, last 5 seconds :          0
LSAs retransmitted     :                    9, last 5 seconds :          0
LSAs transmitted to nbr:                    5, last 5 seconds :          0
LSAs requested         :                   15, last 5 seconds :          0
LSAs acknowledged      :                   64, last 5 seconds :          0

Flood queue depth      :               0
Total rexmit entries   :               0
db summaries           :               0
lsreq entries          :               0

<notice>Receive errors:
  None</notice>

Deaktiver RIP

Først ændrer vi Global route Preference til default og så fjerner vi RIP.

Her kan vi se at alle netværk er lært via både RIP og OSPF. RIP Routen er den aktive(*). 

[edit]
rael@SRX240# <input>run show route table P1.inet.0</input>

P1.inet.0: 16 destinations, 21 routes (16 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both

10.0.0.0/30        *[Direct/0] 02:02:48
                    > via lt-0/0/0.1
10.0.0.1/32        *[Local/0] 02:08:03
                      Local via lt-0/0/0.1
<notice>10.0.0.4/30        *[RIP/100] 01:20:00, metric 2, tag 0
                    > to 10.0.0.2 via lt-0/0/0.1</notice>
                    [OSPF/101] 00:14:56, metric 2
                    > to 10.0.0.2 via lt-0/0/0.1
10.0.0.8/30        *[Direct/0] 02:02:48
                    > via lt-0/0/0.10
10.0.0.10/32       *[Local/0] 02:08:03
                      Local via lt-0/0/0.10
<notice>10.0.0.12/30       *[RIP/100] 01:20:01, metric 2, tag 0
                    > to 10.0.0.9 via lt-0/0/0.10</notice>
                    [OSPF/101] 00:15:05, metric 2
                    > to 10.0.0.9 via lt-0/0/0.10
10.1.0.0/24        *[Direct/0] 01:19:59
                    > via lo0.1
10.1.0.1/32        *[Local/0] 01:19:59
                      Local via lo0.1
<notice>10.2.0.0/24        *[RIP/100] 01:19:55, metric 2, tag 0
                    > to 10.0.0.2 via lt-0/0/0.1</notice>
                    [OSPF/101] 00:14:56, metric 1
                    > to 10.0.0.2 via lt-0/0/0.1
10.2.0.1/32        *[OSPF/101] 00:14:56, metric 1
                    > to 10.0.0.2 via lt-0/0/0.1
<notice>10.3.0.0/24        *[RIP/100] 01:19:55, metric 2, tag 0
                    > to 10.0.0.9 via lt-0/0/0.10</notice>
                    [OSPF/101] 00:15:05, metric 1
                    > to 10.0.0.9 via lt-0/0/0.10
10.3.0.1/32        *[OSPF/101] 00:15:05, metric 1
                    > to 10.0.0.9 via lt-0/0/0.10
<notice>10.4.0.0/24        *[RIP/100] 01:11:15, metric 3, tag 0
                    > to 10.0.0.2 via lt-0/0/0.1
                      to 10.0.0.9 via lt-0/0/0.10</notice>
                    [OSPF/101] 00:14:56, metric 2
                      to 10.0.0.2 via lt-0/0/0.1
                    > to 10.0.0.9 via lt-0/0/0.10
10.4.0.1/32        *[OSPF/101] 00:14:56, metric 2
                    > to 10.0.0.2 via lt-0/0/0.1
                      to 10.0.0.9 via lt-0/0/0.10
224.0.0.5/32       *[OSPF/10] 00:33:28, metric 1
                      MultiRecv
224.0.0.9/32       *[RIP/100] 00:16:02, metric 1
                      MultiRecv

Slet den forhøjede Route Preference på 101, så den falder tilbage på 10(default) 

[edit routing-instances]
rael@SRX240# <input>delete P1 protocols ospf preference</input>

[edit routing-instances]
rael@SRX240# <input>delete P2 protocols ospf preference</input>

[edit routing-instances]
rael@SRX240# <input>delete P3 protocols ospf preference</input>

[edit routing-instances]
rael@SRX240# <input>delete P4 protocols ospf preference</input

[edit routing-instances]
rael@SRX240# <input>commit</input>

Alle routes har nu skiftet til OSPF routes i stedet for RIP 

[edit routing-instances]
rael@SRX240# <input>run show route table P1.inet.0</input>

P1.inet.0: 16 destinations, 20 routes (16 active, 4 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both

10.0.0.0/30        *[Direct/0] 02:20:03
                    > via lt-0/0/0.1
10.0.0.1/32        *[Local/0] 02:25:18
                      Local via lt-0/0/0.1
<notice>10.0.0.4/30        *[OSPF/10] 00:00:10, metric 2
                    > to 10.0.0.2 via lt-0/0/0.1</notice>
                    [RIP/100] 01:37:15, metric 2, tag 0
                    > to 10.0.0.2 via lt-0/0/0.1
10.0.0.8/30        *[Direct/0] 02:20:03
                    > via lt-0/0/0.10
10.0.0.10/32       *[Local/0] 02:25:18
                      Local via lt-0/0/0.10
<notice>10.0.0.12/30       *[OSPF/10] 00:00:10, metric 2
                    > to 10.0.0.9 via lt-0/0/0.10</notice>
                    [RIP/100] 01:37:16, metric 2, tag 0
                    > to 10.0.0.9 via lt-0/0/0.10
10.1.0.0/24        *[Direct/0] 01:37:14
                    > via lo0.1
10.1.0.1/32        *[Local/0] 01:37:14
                      Local via lo0.1
<notice>10.2.0.0/24        *[OSPF/10] 00:00:10, metric 1
                    > to 10.0.0.2 via lt-0/0/0.1</notice>
                    [RIP/100] 01:37:10, metric 2, tag 0
                    > to 10.0.0.2 via lt-0/0/0.1
10.2.0.1/32        *[OSPF/10] 00:00:10, metric 1
                    > to 10.0.0.2 via lt-0/0/0.1
<notice>10.3.0.0/24        *[OSPF/10] 00:00:10, metric 1
                    > to 10.0.0.9 via lt-0/0/0.10</notice>
                    [RIP/100] 01:37:10, metric 2, tag 0
                    > to 10.0.0.9 via lt-0/0/0.10
10.3.0.1/32        *[OSPF/10] 00:00:10, metric 1
                    > to 10.0.0.9 via lt-0/0/0.10
10.4.0.0/24        *[OSPF/10] 00:00:10, metric 2
                      to 10.0.0.2 via lt-0/0/0.1
                    > to 10.0.0.9 via lt-0/0/0.10
10.4.0.1/32        *[OSPF/10] 00:00:10, metric 2
                      to 10.0.0.2 via lt-0/0/0.1
                    > to 10.0.0.9 via lt-0/0/0.10
224.0.0.5/32       *[OSPF/10] 00:50:43, metric 1
                      MultiRecv
224.0.0.9/32       *[RIP/100] 00:00:10, metric 1
                      MultiRecv

Nu hvor OSPF har alle de aktive routes, kan vi slette RIP i alle instances. 

[edit routing-instances]
rael@SRX240# <input>delete P1 protocols rip</input>

[edit routing-instances]
rael@SRX240# <input>delete P2 protocols rip</input>

[edit routing-instances]
rael@SRX240# <input>delete P3 protocols rip</input>

[edit routing-instances]
rael@SRX240# <input>delete P4 protocols rip</input>

[edit routing-instances]
rael@SRX240# <input>commit</input>
commit complete

[edit routing-instances]
rael@SRX240# <input>run show route protocol rip table P1.inet.0</input>

P1.inet.0: 15 destinations, 15 routes (15 active, 0 holddown, 0 hidden)

[edit routing-instances]
rael@SRX240#

Tuning af OSPF

Passiv interfaces

Referencer

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