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Weird GNS3 thing or am I doing it wrong?

2020-09-28 17_38_24-S-TEST1 - s-test1 - Remote Desktop Connection.png

 

So I loaded this topology backup in GNS3 and I noticed that Edge2 can't ping any of the 172.16 addresses.  I was pretty sure this was working before.  I've done "clear ip bgp *" on both Edge1 and Edge 2.  Weirdest part to me is, Edge 2 has the routes for it, pointing at Edge1 as the next hop, but pings just won't work.

 

Edge1:

Gateway of last resort is 172.16.0.1 to network 0.0.0.0

S*    0.0.0.0/0 [1/0] via 172.16.0.1
      10.0.0.0/8 is variably subnetted, 7 subnets, 3 masks
C        10.0.0.0/30 is directly connected, GigabitEthernet2/0
L        10.0.0.2/32 is directly connected, GigabitEthernet2/0
B        10.0.0.4/30 [20/0] via 10.0.0.1, 00:48:51
B        10.0.1.0/24 [20/0] via 10.0.0.1, 00:48:51
B        10.0.2.0/24 [20/0] via 10.0.0.1, 00:48:51
B        10.0.3.0/24 [20/0] via 10.0.0.1, 00:48:51
B        10.0.4.0/24 [20/0] via 10.0.0.1, 00:48:51
      172.16.0.0/16 is variably subnetted, 6 subnets, 3 masks
C        172.16.0.0/30 is directly connected, GigabitEthernet1/0
L        172.16.0.2/32 is directly connected, GigabitEthernet1/0
B        172.16.1.0/24 [20/0] via 172.16.0.1, 00:47:44
B        172.16.2.0/24 [20/0] via 172.16.0.1, 00:47:44
B        172.16.3.0/24 [20/0] via 172.16.0.1, 00:47:44
B        172.16.4.0/24 [20/0] via 172.16.0.1, 00:47:44
      192.168.0.0/24 is variably subnetted, 6 subnets, 3 masks
C        192.168.0.0/30 is directly connected, GigabitEthernet3/0
L        192.168.0.1/32 is directly connected, GigabitEthernet3/0
O        192.168.0.4/30 [110/2] via 192.168.0.2, 00:05:39, GigabitEthernet3/0
O        192.168.0.8/30 [110/2] via 192.168.0.19, 00:29:43, GigabitEthernet4/0
C        192.168.0.16/29 is directly connected, GigabitEthernet4/0
L        192.168.0.18/32 is directly connected, GigabitEthernet4/0
O     192.168.1.0/24 [110/2] via 192.168.0.2, 00:05:39, GigabitEthernet3/0
O     192.168.2.0/24 [110/3] via 192.168.0.19, 00:29:43, GigabitEthernet4/0
                     [110/3] via 192.168.0.2, 00:05:39, GigabitEthernet3/0
EDGE1#
EDGE1#sh run | s bgp
router bgp 65000
 bgp log-neighbor-changes
 no bgp default ipv4-unicast
 neighbor 10.0.0.1 remote-as 65222
 neighbor 172.16.0.1 remote-as 65111
 neighbor 192.168.0.19 remote-as 65000
 !
 address-family ipv4
  neighbor 10.0.0.1 activate
  neighbor 172.16.0.1 activate
  neighbor 192.168.0.19 activate
  neighbor 192.168.0.19 next-hop-self
 exit-address-family
EDGE1#
EDGE1#sh ip pro
*** IP Routing is NSF aware ***

Routing Protocol is "ospf 1"
  Outgoing update filter list for all interfaces is not set
  Incoming update filter list for all interfaces is not set
  Router ID 192.168.0.18
  Number of areas in this router is 1. 1 normal 0 stub 0 nssa
  Maximum path: 4
  Routing for Networks:
    192.168.0.1 0.0.0.0 area 0
    192.168.0.18 0.0.0.0 area 0
  Passive Interface(s):
    FastEthernet0/0
    GigabitEthernet1/0
    GigabitEthernet2/0
    GigabitEthernet5/0
    GigabitEthernet6/0
    VoIP-Null0
  Routing Information Sources:
    Gateway         Distance      Last Update
    192.168.1.1          110      00:05:47
    192.168.2.1          110      00:05:47
  Distance: (default is 110)
          
Routing Protocol is "bgp 65000"
  Outgoing update filter list for all interfaces is not set
  Incoming update filter list for all interfaces is not set
  IGP synchronization is disabled
  Automatic route summarization is disabled
  Neighbor(s):
    Address          FiltIn FiltOut DistIn DistOut Weight RouteMap
    10.0.0.1                                             
    172.16.0.1                                           
    192.168.0.19                                         
  Maximum path: 1
  Routing Information Sources:
    Gateway         Distance      Last Update
    10.0.0.1              20      00:49:00
    172.16.0.1            20      00:46:10
  Distance: external 20 internal 200 local 200

EDGE1#
EDGE1#sh ip bgp
BGP table version is 24, local router ID is 192.168.0.18
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal, 
              r RIB-failure, S Stale, m multipath, b backup-path, f RT-Filter, 
              x best-external, a additional-path, c RIB-compressed, 
Origin codes: i - IGP, e - EGP, ? - incomplete
RPKI validation codes: V valid, I invalid, N Not found

     Network          Next Hop            Metric LocPrf Weight Path
 r i 10.0.0.0/30      192.168.0.19             0    100      0 65222 i
 r>                   10.0.0.1                 0             0 65222 i
 * i 10.0.0.4/30      192.168.0.19             0    100      0 65222 i
 *>                   10.0.0.1                 0             0 65222 i
 * i 10.0.1.0/24      192.168.0.19             0    100      0 65222 i
 *>                   10.0.0.1                 0             0 65222 i
 * i 10.0.2.0/24      192.168.0.19             0    100      0 65222 i
 *>                   10.0.0.1                 0             0 65222 i
 * i 10.0.3.0/24      192.168.0.19             0    100      0 65222 i
 *>                   10.0.0.1                 0             0 65222 i
 * i 10.0.4.0/24      192.168.0.19             0    100      0 65222 i
 *>                   10.0.0.1                 0             0 65222 i
 r>  172.16.0.0/30    172.16.0.1               0             0 65111 i
 *>  172.16.1.0/24    172.16.0.1               0             0 65111 i
     Network          Next Hop            Metric LocPrf Weight Path
 *>  172.16.2.0/24    172.16.0.1               0             0 65111 i
 *>  172.16.3.0/24    172.16.0.1               0             0 65111 i
 *>  172.16.4.0/24    172.16.0.1               0             0 65111 i

Edge2:

Gateway of last resort is 10.0.0.5 to network 0.0.0.0

S*    0.0.0.0/0 [1/0] via 10.0.0.5
      10.0.0.0/8 is variably subnetted, 7 subnets, 3 masks
B        10.0.0.0/30 [20/0] via 10.0.0.5, 00:19:12
C        10.0.0.4/30 is directly connected, GigabitEthernet1/0
L        10.0.0.6/32 is directly connected, GigabitEthernet1/0
B        10.0.1.0/24 [20/0] via 10.0.0.5, 00:19:12
B        10.0.2.0/24 [20/0] via 10.0.0.5, 00:19:12
B        10.0.3.0/24 [20/0] via 10.0.0.5, 00:19:12
B        10.0.4.0/24 [20/0] via 10.0.0.5, 00:19:12
      172.16.0.0/16 is variably subnetted, 5 subnets, 2 masks
B        172.16.0.0/30 [200/0] via 192.168.0.18, 00:19:12
B        172.16.1.0/24 [200/0] via 192.168.0.18, 00:19:12
B        172.16.2.0/24 [200/0] via 192.168.0.18, 00:19:12
B        172.16.3.0/24 [200/0] via 192.168.0.18, 00:19:12
B        172.16.4.0/24 [200/0] via 192.168.0.18, 00:19:12
      192.168.0.0/24 is variably subnetted, 6 subnets, 3 masks
O        192.168.0.0/30 [110/2] via 192.168.0.18, 00:07:06, GigabitEthernet2/0
O        192.168.0.4/30 [110/2] via 192.168.0.10, 01:35:25, GigabitEthernet3/0
C        192.168.0.8/30 is directly connected, GigabitEthernet3/0
L        192.168.0.9/32 is directly connected, GigabitEthernet3/0
C        192.168.0.16/29 is directly connected, GigabitEthernet2/0
L        192.168.0.19/32 is directly connected, GigabitEthernet2/0
O     192.168.1.0/24 [110/3] via 192.168.0.18, 00:07:06, GigabitEthernet2/0
                     [110/3] via 192.168.0.10, 01:35:25, GigabitEthernet3/0
O     192.168.2.0/24 [110/2] via 192.168.0.10, 01:35:25, GigabitEthernet3/0
EDGE2#
EDGE2#sh run | s bgp
router bgp 65000
 bgp log-neighbor-changes
 no bgp default ipv4-unicast
 neighbor 10.0.0.5 remote-as 65222
 neighbor 192.168.0.18 remote-as 65000
 !
 address-family ipv4
  neighbor 10.0.0.5 activate
  neighbor 192.168.0.18 activate
  neighbor 192.168.0.18 next-hop-self
 exit-address-family
EDGE2#
EDGE2#sh ip pro
*** IP Routing is NSF aware ***

Routing Protocol is "ospf 1"
  Outgoing update filter list for all interfaces is not set
  Incoming update filter list for all interfaces is not set
  Router ID 192.168.0.19
  Number of areas in this router is 1. 1 normal 0 stub 0 nssa
  Maximum path: 4
  Routing for Networks:
    192.168.0.9 0.0.0.0 area 0
    192.168.0.19 0.0.0.0 area 0
  Passive Interface(s):
    FastEthernet0/0
    GigabitEthernet1/0
    GigabitEthernet4/0
    GigabitEthernet5/0
    GigabitEthernet6/0
    VoIP-Null0
  Routing Information Sources:
    Gateway         Distance      Last Update
    192.168.1.1          110      00:07:14
    192.168.2.1          110      01:35:33
    192.168.0.18         110      00:07:24
  Distance: (default is 110)

Routing Protocol is "bgp 65000"
  Outgoing update filter list for all interfaces is not set
  Incoming update filter list for all interfaces is not set
  IGP synchronization is disabled
  Automatic route summarization is disabled
  Neighbor(s):
    Address          FiltIn FiltOut DistIn DistOut Weight RouteMap
    10.0.0.5                                             
    192.168.0.18                                         
  Maximum path: 1
  Routing Information Sources:
    Gateway         Distance      Last Update
    10.0.0.5              20      00:19:21
    192.168.0.18         200      00:19:21
  Distance: external 20 internal 200 local 200

EDGE2#
EDGE2#sh ip bgp
BGP table version is 12, local router ID is 192.168.0.19
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal, 
              r RIB-failure, S Stale, m multipath, b backup-path, f RT-Filter, 
              x best-external, a additional-path, c RIB-compressed, 
Origin codes: i - IGP, e - EGP, ? - incomplete
RPKI validation codes: V valid, I invalid, N Not found

     Network          Next Hop            Metric LocPrf Weight Path
 *>  10.0.0.0/30      10.0.0.5                 0             0 65222 i
 * i                  192.168.0.18             0    100      0 65222 i
 r>  10.0.0.4/30      10.0.0.5                 0             0 65222 i
 r i                  192.168.0.18             0    100      0 65222 i
 *>  10.0.1.0/24      10.0.0.5                 0             0 65222 i
 * i                  192.168.0.18             0    100      0 65222 i
 *>  10.0.2.0/24      10.0.0.5                 0             0 65222 i
 * i                  192.168.0.18             0    100      0 65222 i
 *>  10.0.3.0/24      10.0.0.5                 0             0 65222 i
 * i                  192.168.0.18             0    100      0 65222 i
 *>  10.0.4.0/24      10.0.0.5                 0             0 65222 i
 * i                  192.168.0.18             0    100      0 65222 i
 *>i 172.16.0.0/30    192.168.0.18             0    100      0 65111 i
 *>i 172.16.1.0/24    192.168.0.18             0    100      0 65111 i
     Network          Next Hop            Metric LocPrf Weight Path
 *>i 172.16.2.0/24    192.168.0.18             0    100      0 65111 i
 *>i 172.16.3.0/24    192.168.0.18             0    100      0 65111 i
 *>i 172.16.4.0/24    192.168.0.18             0    100      0 65111 i

Can anyone tell me what I'm doing wrong?  It has the routes, so I would think pings would work.  Scratching my head on this one.  

 

2 Replies 2

NVM I'm stupid.  Forgot about return traffic

Hello @WallaceVanDunk1494 ,

it is not a problem you have provided feedback on the issue.

EDGE1 needed to advertise 192.168.0.16/29 to ISP1 in eBGP session using a network command.

 

 

Hope to help

Giuseppe

 

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