Configuration Guide Vol. 3

30.3.4 Checking routes resulting from learned route filtering

Routes permitted by learned route filtering are entered into the routing table. You can check the results of learned route filtering by viewing the routes in the routing table.

To display every route in the routing table including invalid routes, execute the show ipv6 route operation command with the all-routes parameter specified.

Figure 30-7: Example of displaying routes in the routing table (including invalid routes) 
> show ipv6 route all-routes
Date 20XX/07/14 12:00:00 UTC
Status Codes: * valid, > active, r RIB failure
Total: 11 routes
   Destination                              Next Hop
         Interface   Metric  Protocol    Age
*> ::1/128                                  ::1                              -
         localhost   0/0     Connected    4h 44m                             |
*> 3ffe:177:7:7::/64                        3ffe:177:7:7::1                  |
         VLAN0007    0/0     Connected   39m 41s                             |
*  3ffe:177:7:7::/64                        3ffe:177:7:7::1                  |
         VLAN0007    1/-     OSPFv3 intra 6m 52s                             |
*> 3ffe:177:7:7::1/128                      ::1                              |
         localhost   0/0     Connected   39m 41s                             |
*> 3ffe:3b01:6705:1::/64                    fe80::200:87ff:fe28:90d7%VLAN0007|
         VLAN0007    2/0     RIPng        2s                                 |
*> 3ffe:3b11:6705:1::/64                    fe80::200:87ff:fe28:90d7%VLAN0007 #
         VLAN0007    -/-     BGP4+        4m  5s                             |
*> 3ffe:3b21:6705:1::/64                    fe80::200:87ff:fe28:90d7%VLAN0007|
         VLAN0007    1/1     OSPFv3 ext2  4m  3s                             |
*> 3ffe:8703:2005:1::/64                    3ffe:177:7:7::145                |
         VLAN0007    0/0     Static       1m 15s                             |
*  3ffe:8703:2005:1::/64                    fe80::200:87ff:fe28:90d7%VLAN0007|
         VLAN0007    -/-     BGP4+        8m 27s                             |
*  3ffe:8703:2005:1::/64                    fe80::200:87ff:fe28:90d7%VLAN0007|
         VLAN0007    1/1     OSPFv3 ext2  6m 22s                             |
*  3ffe:8703:2005:1::/64                    fe80::200:87ff:fe28:90d7%VLAN0007|
         VLAN0007    2/0     RIPng        2s                                 -
#

The characters * and > at the beginning of an entry signify the following:

*: Signifies a valid route. Its absence indicates an invalid route.

>: Signifies a prioritized route. Only prioritized routes are used for packet transfer.

To check only those routes that were learned by a specific protocol, execute the show ipv6 route operation command with the all-routes parameter and the protocol name specified.

Figure 30-8: Example of displaying routes in the routing table (including invalid routes for RIPng only) 
> show ipv6 route all-routes rip
Date 20XX/07/14 12:00:00 UTC
Status Codes: * valid, > active, r RIB failure
Total: 2 routes
   Destination                                 Next Hop
         Interface      Metric   Protocol  Age
*> 3ffe:3b01:6705:1::/64                       fe80::200:87ff:fe28:90d7%VLAN0007
         VLAN0007       2/0      RIPng      3s
*  3ffe:8703:2005:1::/64                       fe80::200:87ff:fe28:90d7%VLAN0007
         VLAN0007       2/0      RIPng      3s

If the various protocols generate more than one route to the same destination network, you will need to check which protocol supplied the prioritized route, and the priority of each route. The priority of each route is determined by its distance value.

To display distance values, execute the show ipv6 route operation command with the all-routes and -P parameters specified. The distance is the first value in the Distance column at the end of each line.

Figure 30-9: Example of displaying route distance in the routing table 
> show ipv6 route all-routes -P
Date 20XX/07/14 12:00:00 UTC
Status Codes: * valid, > active, r RIB failure
Total: 11 routes
   Destination                              Next Hop
         Interface  Metric  Protocol    Age
*> ::1/128                                  ::1
         localhost  0/0     Connected    4h 46m , Distance: 0/0/0
*> 3ffe:177:7:7::/64                        3ffe:177:7:7::1
         VLAN0007   0/0     Connected   42m  0s , Distance: 0/0/0
*  3ffe:177:7:7::/64                        3ffe:177:7:7::1
         VLAN0007   1/-     OSPFv3 intra 9m 11s , Distance: 110/1/0
*> 3ffe:177:7:7::1/128                      ::1
         localhost  0/0     Connected   42m  0s , Distance: 0/0/0
*> 3ffe:3b01:6705:1::/64                    fe80::200:87ff:fe28:90d7%VLAN0007
         VLAN0007   2/0     RIPng       16s     , Distance: 120/0/0
*> 3ffe:3b11:6705:1::/64                    fe80::200:87ff:fe28:90d7%VLAN0007
         VLAN0007   -/-     BGP4+        6m 24s , Distance: 20/0/0
*> 3ffe:3b21:6705:1::/64                    fe80::200:87ff:fe28:90d7%VLAN0007
         VLAN0007   1/1     OSPFv3 ext2  6m 22s , Distance: 110/1/0
*> 3ffe:8703:2005:1::/64                    3ffe:177:7:7::145
         VLAN0007   0/0     Static       3m 34s , Distance: 2/0/0
*  3ffe:8703:2005:1::/64                    fe80::200:87ff:fe28:90d7%VLAN0007
         VLAN0007   -/-     BGP4+       10m 46s , Distance: 20/0/0
*  3ffe:8703:2005:1::/64                    fe80::200:87ff:fe28:90d7%VLAN0007
         VLAN0007   1/1     OSPFv3 ext2  8m 41s , Distance: 110/1/0
*  3ffe:8703:2005:1::/64                    fe80::200:87ff:fe28:90d7%VLAN0007
         VLAN0007   2/0     RIPng       16s     , Distance: 120/0/0

To display the distance values for routes to a specific destination, execute the show ipv6 route operation command with the all-routes parameter and the destination network specified. The route's distance is the first value on the Distance line in the detailed routing information.

Figure 30-10: Example of displaying routes in the routing table (for specific destinations, including invalid routes) 
> show ipv6 route all-routes 3ffe:8703:2005:1::/64
Date 20XX/07/14 12:00:00 UTC
Route codes: *  = active,   + = changed to active recently
            ' ' = inactive, - = changed to inactive recently
             r  = RIB failure
 
Route 3ffe:8703:2005:1::/64
Entries 4 Announced 1 Depth 0 <>
 
* NextHop 3ffe:177:7:7::145, Interface: VLAN0007
     Protocol <Static>
     Source Gateway ----
     Metric/2    : 0/0
     Distance/2/3: 2/0/0
     Tag : 0, Age :  4m 35s
     AS Path : IGP (Id 1)
     Communities: -
     LocalPref : -
     RT State: <Remote Int Active Gateway>
 
  NextHop fe80::200:87ff:fe28:90d7%VLAN0007, Interface: VLAN0007
     Protocol <BGP4+>
     Source Gateway fe80::200:87ff:fe28:90d7%VLAN0007
     Metric/2    : -/-
     Distance/2/3: 20/0/0
     Tag : 0, Age : 11m 47s
     AS Path : 1000 IGP (Id 3)
     Communities: -
     LocalPref : 100
     RT State: <Ext Gateway>

To check detailed attribute information for routes, use the show ipv6 route operation command with the all-routes and -F parameters specified.

Figure 30-11: Example of displaying routes in the routing table (including invalid routes and detailed information) 
> show ipv6 route all-routes -F
Date 20XX/07/14 12:00:00 UTC
Status Codes: * valid, > active, r RIB failure
Total: 11 routes
   Destination                               Next Hop
       Interface   Metric  Protocol     Age
*> ::1/128                                   ::1
       localhost   0/0     Connected     4h 55m , Distance: 0/0/0, Tag: 0, AS
-Path: IGP (Id 1), Communities: -, LocalPref: -, <NoAdvise Active Retain>
*> 3ffe:177:7:7::/64                         3ffe:177:7:7::1
       VLAN0007    0/0     Connected    51m  2s , Distance: 0/0/0, Tag: 0, AS
-Path: IGP (Id 1), Communities: -, LocalPref: -, <Active Retain>
*  3ffe:177:7:7::/64                         3ffe:177:7:7::1
       VLAN0007    1/-     OSPFv3 intra 18m 13s , Distance: 110/1/0, Tag: 0,
AS-Path: IGP (Id 1), Communities: -, LocalPref: -, <Int Gateway>
*> 3ffe:177:7:7::1/128                       ::1
       localhost   0/0     Connected    51m  2s , Distance: 0/0/0, Tag: 0, AS
-Path: IGP (Id 1), Communities: -, LocalPref: -, <NoAdvise Int Active Retain>
*> 3ffe:3b01:6705:1::/64                     fe80::200:87ff:fe28:90d7%VLAN0007
       VLAN0007    2/0     RIPng         4s     , Distance: 120/0/0, Tag: 0,
AS-Path: IGP (Id 1), Communities: -, LocalPref: -, <Int Active Gateway>
*> 3ffe:3b11:6705:1::/64                     fe80::200:87ff:fe28:90d7%VLAN0007
       VLAN0007    -/-     BGP4+         3m  6s , Distance: 20/0/0, Tag: 0, A
S-Path: 1000 IGP (Id 3), Communities: -, LocalPref: 100, <Ext Active Gateway>
*> 3ffe:3b21:6705:1::/64                     fe80::200:87ff:fe28:90d7%VLAN0007
       VLAN0007    1/1     OSPFv3 ext2  15m 24s , Distance: 110/1/0, Tag: 0,
 AS-Path: IGP (Id 1), Communities: -, LocalPref: -, <Int Ext Active Gateway>
*> 3ffe:8703:2005:1::/64                     3ffe:177:7:7::145
       VLAN0007    0/0     Static       12m 36s , Distance: 2/0/0, Tag: 0, AS
-Path: IGP (Id 1), Communities: -, LocalPref: -, <Remote Int Active Gateway>
*  3ffe:8703:2005:1::/64                     fe80::200:87ff:fe28:90d7%VLAN0007
       VLAN0007    -/-     BGP4+         3m  6s , Distance: 20/0/0, Tag: 0, A
S-Path: 1000 IGP (Id 5), Communities: 300:300, LocalPref: 100, <Ext Gateway>
*  3ffe:8703:2005:1::/64                     fe80::200:87ff:fe28:90d7%VLAN0007
       VLAN0007    1/1     OSPFv3 ext2  17m 43s , Distance: 110/1/0, Tag: 0,
 AS-Path: IGP (Id 1), Communities: -, LocalPref: -, <Int Ext Gateway>
*  3ffe:8703:2005:1::/64                     fe80::200:87ff:fe28:90d7%VLAN0007
       VLAN0007    2/0     RIPng         4s     , Distance: 120/0/0, Tag: 0,
AS-Path: IGP (Id 1), Communities: -, LocalPref: -, <Int Gateway>

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