Re: BGPD.conf - Clue needed

2015-02-03 Thread Stuart Henderson 
On 2015-02-03, Rod Whitworth glis...@witworx.com wrote:
 There has been a suggestion that $Best should be seeing the /21 as two /22s 
 which would 
 make it a more preferable path.

 Any suggestions?

 I don't like unaggreated net blocks and I don't know how to modify the bgpd 
 config to do 
 that either.

I think this is an occasion where deaggregation is the only way to do what you 
need.
Because some networks filter on RIR minimum allocations, it may be beneficial to
continue to advertise the /21 over both transits, and make the /22s additional
(rather than replacing /21 with 2x/22).

In terms of bgpd config, add network lines for the two /22's, and use filters
to selectively advertise them.

Good luck with the op Rod, I hope it goes well.

BGPD.conf - Clue needed

2015-02-02 Thread Rod Whitworth 
I'm trying to help a friend with a bgpd problem and I'm cutting down the 
bgpd.conf more 
than I  normally would because I'm prepping for a serious eye operation and I 
don't have 
the time to edit the entire file to make it impervious to unwanted viewers.

Here are what I think illustrates the problem and the pertinent parts of the 
conf.
BOF

network A.B.C/21
nexthop qualify via bgp

neighbor $LowPri {
remote-as   *
descr   LowPriv4
passive
set prepend-self 8
set prepend-neighbor 8
announceself
announceIPv6 none


neighbor  $Best {
remote-as   **
descr   Bestv4
passive
set weight 0
set prepend-self 2
set prepend-neighbor 2
announceself
announceIPv6 none

EOF

$Best is a high reliability, reasonable priced neighbour.

The $LowPri neighbour has an upstream peer neighbour which refuses to honour 
prepends or any other means of making it a path of lower priority.

There has been a suggestion that $Best should be seeing the /21 as two /22s 
which would 
make it a more preferable path.

Any suggestions?

I don't like unaggreated net blocks and I don't know how to modify the bgpd 
config to do 
that either.

My mother would have said: When needs must, the devil drives!

Questions may have a slow response whilst I'm being treated. I may see them 
but be 
unable to reply promptly.

TIA,

/Rod/




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Rod/
---
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