02-01-2013 07:42 PM - edited 03-04-2019 06:54 PM
The prefix 100.179.12.0/24 is learnt on tap via eBGP and eigrp..
i have set bgp backdoor command so that IGP wins over BGP
But it looks like even after hard reset, isn't working. can someone explain if i miss something here?
tap#show run | s r bgp
router bgp 65457
no synchronization
bgp log-neighbor-changes
network 100.179.10.0 mask 255.255.255.0
network 100.179.11.0 mask 255.255.255.0
network 100.179.12.0 backdoor
neighbor 10.0.0.2 remote-as 65457
neighbor 10.0.0.2 shutdown
neighbor 11.1.1.2 remote-as 65000
no auto-summary
tap#show ip bgp 100.179.12.0
BGP routing table entry for 100.179.12.0/24, version 5
Paths: (1 available, best #1, table Default-IP-Routing-Table)
Not advertised to any peer
65000 65458
11.1.1.2 from 11.1.1.2 (152.0.0.1)
Origin IGP, localpref 100, valid, external, best
tap#show ip route 100.179.12.0
Routing entry for 100.179.12.0/24
Known via "bgp 65457", distance 20, metric 0
Tag 65000, type external
Last update from 11.1.1.2 00:05:15 ago
Routing Descriptor Blocks:
* 11.1.1.2, from 11.1.1.2, 00:05:15 ago
Route metric is 0, traffic share count is 1
AS Hops 2
Route tag 65000
tap#show ip ei top 100.179.12.0/24
IP-EIGRP (AS 1): Topology entry for 100.179.12.0/24
State is Passive, Query origin flag is 1, 0 Successor(s), FD is 4294967295
Routing Descriptor Blocks:
10.0.0.2 (Serial0/0), from 10.0.0.2, Send flag is 0x0
Composite metric is (2297856/128256), Route is Internal
Vector metric:
Minimum bandwidth is 1544 Kbit
Total delay is 25000 microseconds
Reliability is 255/255
Load is 1/255
Minimum MTU is 1500
Hop count is 1
tap#
02-01-2013 07:51 PM
is this the problem with mask?
02-02-2013 12:35 AM
yes, it will be problem with mask. If you do not set mask, BGP thinks classful so network 100.179.12.0 backdoor means:
network 100.179.12.0 mask 255.0.0.0 backdoor which to no match 100.179.12.0/24.
02-01-2013 10:50 PM
Hi
Can u incule mask in the backdoor command and try.
Thanks
02-20-2013 04:04 PM
Since you have not added ask in backdoor command. It will consider ar /8 and there will be no effecte in that.
Give the command network 100.179.12.0 mask 255.255.255.0 backdoor
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