From: Volkov, Dmitry (IDS Canada) (dmitry_volkov@ca.ml.com)
Date: Tue May 13 2003 - 11:13:31 GMT-3
Yes,
I tried on different routers with diff ADs - effect is the same.
However with EIGRP it works as supposed to be.
But not with BGP.... The same time when I remove static - BGP route appears
in RT.
IOS 12.1(5)T14 Maybe bug...
Dmitry Volkov
CCIE # 10292
> -----Original Message-----
> From: Donny MATEO [mailto:donny.mateo@sg.ca-indosuez.com]
> Sent: Monday, May 12, 2003 10:06 PM
> To: Volkov, Dmitry (IDS Canada)
> Cc: 'ccielab@groupstudy.com'; nobody@groupstudy.com
> Subject: Re: statics to Null, BGP weird
>
>
> as weird as it can be, could it be the router is assuming
> that static route is a connected network and for a connected
> network it doesn't bother to check AD configured hehehe...
> Have you tried to change the AD or simulate it in other
> router, and see if it comes to the same behaviour ?
>
> Donny Mateo
> CCIE #11189
>
>
>
>
>
>
> "Volkov, Dmitry
>
>
> (IDS Canada)" To:
> "'ccielab@groupstudy.com'" <ccielab@groupstudy.com>
>
> <dmitry_volkov@ca cc:
>
>
> .ml.com> Subject:
> statics to Null, BGP weird
>
> Sent by:
>
>
> nobody@groupstudy
>
>
> .com
>
>
>
>
>
>
>
>
> 05/13/2003 07:22
>
>
> AM
>
>
> Please respond to
>
>
> "Volkov, Dmitry
>
>
> (IDS Canada)"
>
>
>
>
>
>
>
>
>
>
>
>
> Hello group,
>
> Can anybody explain that ??
> On R8 I have in RT prefix via Null0 with AD 250 better than
> learned via
> IBGP with AD 200 ??
>
> R8-------R4------R5
> R8 and R4 run IBGP, R4 and R5 EIGRP
> network 170.240.0.0/19 in EIGRP and in RT on R4:
> D EX 170.240.0.0/19 [170/281600] via 206.143.72.142, 01:49:29,
> Ethernet0/0
>
> R4#
> router bgp 1
> network 170.240.0.0 mask 255.255.224.0
> R8#
> router bgp 1
> network 170.240.0.0 mask 255.255.224.0
> !
> ip route 170.240.0.0 255.255.224.0 Null0 250
>
> r8#sh ip bgp 170.240.0.0 255.255.224.0
> BGP routing table entry for 170.240.0.0/19, version 29
> Paths: (1 available, best #1, table Default-IP-Routing-Table)
> Advertised to non peer-group peers:
> 206.143.95.49
> Local
> 206.143.95.242 (metric 896000) from 206.143.95.242
> (206.143.95.242)
> Origin IGP, metric 281600, localpref 100, valid, internal, best
>
> r8#sh ip ro 170.240.0.0
> Routing entry for 170.240.0.0/19
> Known via "static", distance 250, metric 0 (connected)
> Redistributing via eigrp 100
> Routing Descriptor Blocks:
> * directly connected, via Null0
> Route metric is 0, traffic share count is 1
>
> r8(config)#access-list 10 permit 170.240.0.0 0.0.31.255
> r8(config)#^Z
> r8#deb ip routing 10
> IP routing debugging is on for access list 10
> r8#
> r8#conf t
> Enter configuration commands, one per line. End with CNTL/Z.
> r8(config)#no ip route 170.240.0.0 255.255.224.0 Null0 250
> r8(config)#
> 07:12:01: RT: del 170.240.0.0/19 via 0.0.0.0, static metric [250/0]
> 07:12:01: RT: delete subnet route to 170.240.0.0/19
> 07:12:01: RT: network 170.240.0.0 is now variably masked
> 07:12:01: RT: add 170.240.0.0/19 via 206.143.95.242, bgp
> metric [200/281600]
> r8(config)#^Z
> r8#conf t
> r8#sh ip ro 170.240.7.1
> Routing entry for 170.240.0.0/19
> Known via "bgp 1", distance 200, metric 281600, type internal
> Redistributing via eigrp 100
> Last update from 206.143.95.242 00:00:15 ago
> Routing Descriptor Blocks:
> * 206.143.95.242, from 206.143.95.242, 00:00:15 ago
> Route metric is 281600, traffic share count is 1
> AS Hops 0
>
> r8#conf t
> r8(config)#ip route 170.240.0.0 255.255.224.0 Null0 250
> r8(config)#^Z
> r8#clear ip bgp *
> r8#
> 07:14:54: %BGP-5-ADJCHANGE: neighbor 206.143.95.49 Down User reset
> 07:14:54: %BGP-5-ADJCHANGE: neighbor 206.143.95.242 Down User reset
> r8#
> 07:14:54: RT: delete route to 170.240.24.0/21
> 07:14:54: RT: delete route to 170.240.0.0/19
> 07:14:54: RT: add 170.240.0.0/19 via 0.0.0.0, static metric [250/0]
> r8#
> 07:15:23: %BGP-5-ADJCHANGE: neighbor 206.143.95.242 Up
> r8#
> 07:15:23: RT: network 170.240.0.0 is now variably masked
> 07:15:23: RT: add 170.240.24.0/21 via 206.143.95.242, bgp metric
> [200/281600]
> r8#
> 07:15:33: %BGP-5-ADJCHANGE: neighbor 206.143.95.49 Up
> r8#sh ip ro 170.240.0.0
> Routing entry for 170.240.0.0/19
> Known via "static", distance 250, metric 0 (connected)
> Redistributing via eigrp 100
> Routing Descriptor Blocks:
> * directly connected, via Null0
> Route metric is 0, traffic share count is 1
> r8#sh ip bgp
> * i170.240.0.0/19 206.143.95.242 281600 100 0 i
> *> 0.0.0.0 0 32768 i
>
> 170.240.0.0/19 exist in BGP - valid and best , however route
> via Null (with
> higher AD) is installed in RT.
> Why ???
>
> Dmitry Volkov
> CCIE # 10292
>
>
>
>
>
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