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OSPFv2 routing table doesn't contain routes to networks with /32 mask (loopback interfaces) #11

Closed xivamar closed 7 years ago

xivamar commented 8 years ago

Problem Description:

OSPFv2 routing table doesn't contain routes to loopback interfaces.

OpenSwitch version:

OpenSwitch 0.4.0 (Build: appliance-ops-0.4.0-master-20160823125534-dev)

Test Topology:

topology_for_ospf_issue

Steps to reproduce the problem (see attached files):

  1. Configure ospfv2 via script.

  2. Check adjacency via show ip ospf neighbor on DUT1. Neighbor should be in the table:

     switch# show ip ospf neighbor 

     Neighbor ID Pri State           Dead Time Address         Interface            RXmtL RqstL DBsmL
 ----------------------------------------------------------------------------------------------------
 20.20.20.20       1 Full/Backup       35.987s 10.0.12.2       eth3:10.0.12.1/24        0     0     0
 40.40.40.40       1 Full/Backup       38.294s 10.0.14.4       eth1:10.0.14.1/24        0     0     0
 switch#

  3. Check ospf routing table via sho ip ospf route and rib table on DUT1. - NOK: routes to loopback interfaces are absent.

     switch# sho ip ospf route 
 Codes: N - Network, R - Router, IA - Inter Area,
        E1 - External Type 1, E2 - External Type 2
 ============ OSPF network routing table ============
 N    10.0.14.0/24          [10] area: 0.0.0.0
                           directly attached to eth1
N    10.0.34.0/24          [20] area: 0.0.0.0
                           via 10.0.14.4, eth1
N    10.0.12.0/24          [10] area: 0.0.0.0
                           directly attached to eth3
N    10.0.23.0/24          [20] area: 0.0.0.0
                           via 10.0.12.2, eth3
N    100.0.0.4/30          [20] area: 0.0.0.0
                           via 10.0.14.4, eth1

 ============ OSPF router routing table =============
 ============ OSPF external routing table ===========
 switch# 

 switch# show rib
 Displaying ipv4 rib entries 
 '*' denotes selected
 '[x/y]' denotes [distance/metric]

 *1.1.1.1/32,  1 unicast next-hops 
   *via  loopback1,  [0/0],  connected
*10.0.12.0/24,  1 unicast next-hops 
   *via  eth3,  [0/0],  connected
10.0.12.0/24,  1 unicast next-hops 
   *via  eth3,  [110/10],  ospf
*10.0.14.0/24,  1 unicast next-hops 
   *via  eth1,  [0/0],  connected
10.0.14.0/24,  1 unicast next-hops 
    *via  eth1,  [110/10],  ospf
*10.0.23.0/24,  1 unicast next-hops 
   *via  10.0.12.2,  [110/20],  ospf
*10.0.34.0/24,  1 unicast next-hops 
   *via  10.0.12.2,  [110/61],  ospf
*100.0.0.1/32,  1 unicast next-hops 
   *via  loopback2,  [0/0],  connected
*100.0.0.4/30,  1 unicast next-hops 
   *via  10.0.14.4,  [110/51],  ospf

 No ipv6 rib entries 
 switch#

config.txt

xivamar commented 8 years ago

If we add in ospf router command redistribute connected, loopback networks will be advertised. But we get following problem: https://tree.taiga.io/project/openswitch/issue/1634

xivamar commented 7 years ago

Fix for this issue: https://github.com/MERAprojects/ops-quagga/pull/29 https://github.com/MERAprojects/ops-cli/pull/12 https://github.com/MERAprojects/ops-portd/pull/1