[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: routing problem to ftp.iglu.org.il
- To: Israeli Linux Mailing List <linux-il(at-nospam)linux.org.il>
- Subject: Re: routing problem to ftp.iglu.org.il
- From: amir(at-nospam)actcom.co.il (Amir Plivatsky)
- Date: Mon, 26 Nov 2001 02:00:15 +0200
- Delivered-To: linux.org.il-linux-il@linux.org.il
- In-Reply-To: Alex / NiGhTHiNG <dvine@actcom.co.il> "Fwd: routing problem to ftp.iglu.org.il (fwd)" (Nov 25, 9:10pm)
- Organization: ACTCOM - Internet Services in Israel 1-800-300-123 info@actcom.co.il
- Sender: linux-il-bounce(at-nospam)cs.huji.ac.il
Hello,
The problem happened because I tried to balance our AT&T link
(we have links through various providers) by sending more-specific
routes, without sending them to the IIX too, thus forcing all the
traffic for these routes to go through AT&T.
Sorry for the trouble caused. Today morning I intend to implement
that balancing scheme correctly.
Amir
> ---------- Forwarded message ----------
> Date: Sun, 25 Nov 2001 16:31:01 +0200 (IST)
>From: Ariel Biener <ariel@fireball.tau.ac.il>
>
> Hi,
>
>
>
>
> It seems that the net for that server is being advertised in a such way
> that all access to it from outside AT&T or actcom is going via abroad:
>
> Look:
>
> Israel-IX#sh ip bgp 192.117.122.34
> BGP routing table entry for 192.117.96.0/19, version 112897
> Paths: (4 available, best #4)
> ...
>
> 8584 4148, (received-only)
> 192.114.63.86 from 192.114.63.86 (206.49.94.71)
> Origin IGP, localpref 100, valid, external
> 8584 4148, (received-only)
> 192.114.63.142 from 192.114.63.142 (212.150.64.4)
> Origin IGP, localpref 100, valid, external
> 9116 4148 4148 4148, (received-only)
> 192.114.63.146 from 192.114.63.146 (212.199.26.254)
> Origin IGP, localpref 100, valid, external
> 4148 4148 13278 13278, (received & used)
> 192.114.63.74 from 192.114.63.74 (212.199.63.50)
> Origin IGP, metric 0, localpref 100, valid, external, best
>
> Notice that the only accepted route is via actcom, and note that they
> advertise 192.117.96.0/19.
>
> Now, from abroad, there are 25 routes, see below the whole list for
> explanation:
>
>
> BGP routing table entry for 192.117.120.0/21, version 2213269
> Paths: (25 available, best #2)
> Not advertised to any peer
> 5511 8584 8584 8584 13264 13264 13264 1833 1833 1299 2686 3339 4148 4148
> 4148 4148
> 209.1.220.102 from 209.1.220.102 (209.1.220.102)
> Origin incomplete, localpref 1000, valid, internal
> 5511 8584 8584 8584 13264 13264 13264 1833 1833 1299 2686 3339 4148 4148
> 4148 4148
> 209.1.40.51 from 209.1.40.51 (209.1.40.51)
> Origin incomplete, localpref 1000, valid, internal, best
> 5511 8584 8584 8584 13264 13264 13264 1833 1833 1299 2686 3339 4148 4148
> 4148 4148
> 209.1.40.51 from 209.1.220.224 (209.1.40.51)
> Origin incomplete, localpref 1000, valid, internal
> Originator: 209.1.40.51, Cluster list: 0.0.16.125
> 5511 8584 8584 8584 13264 13264 13264 1833 1833 1299 2686 3339 4148 4148
> 4148 4148
> 209.1.220.102 from 209.1.220.89 (209.1.220.102)
> Origin incomplete, localpref 1000, valid, internal
> Originator: 209.1.220.102, Cluster list: 0.0.4.186
> 5511 8584 8584 8584 13264 13264 13264 1833 1833 1299 2686 3339 4148 4148
> 4148 4148
> 209.1.220.102 from 209.1.220.166 (209.1.220.102)
> Origin incomplete, localpref 1000, valid, internal
> Originator: 209.1.220.102, Cluster list: 0.0.4.216
> 3561 5511 8584 8584 8584 13264 13264 13264 1833 1833 1299 2686 3339 4148
> 4148 4148 4148
> 209.1.40.72 from 209.1.40.72 (209.1.40.72)
> Origin incomplete, localpref 1000, valid, internal
> 701 5511 8584 8584 8584 13264 13264 13264 1833 1833 1299 2686 3339 4148
> 4148 4148 4148
> 209.1.220.174 from 209.1.220.174 (209.1.220.174)
> Origin incomplete, localpref 1000, valid, internal
> 701 5511 8584 8584 8584 13264 13264 13264 1833 1833 1299 2686 3339 4148
> 4148 4148 4148
> 209.1.220.203 from 209.1.220.203 (209.1.220.203)
> Origin incomplete, localpref 1000, valid, internal
> 3561 5511 8584 8584 8584 13264 13264 13264 1833 1833 1299 2686 3339 4148
> 4148 4148 4148
> 209.1.220.126 from 209.1.220.126 (209.1.220.126)
> Origin incomplete, localpref 1000, valid, internal
> 3561 5511 8584 8584 8584 13264 13264 13264 1833 1833 1299 2686 3339 4148
> 4148 4148 4148
> 209.1.220.156 from 209.1.220.156 (209.1.220.156)
> Origin incomplete, localpref 1000, valid, internal
> 3561 5511 8584 8584 8584 13264 13264 13264 1833 1833 1299 2686 3339 4148
> 4148 4148 4148
> 209.1.220.139 from 209.1.220.139 (209.1.220.139)
> Origin incomplete, localpref 1000, valid, internal
> 3561 5511 8584 8584 8584 13264 13264 13264 1833 1833 1299 2686 3339 4148
> 4148 4148 4148
> 209.1.220.133 from 209.1.220.133 (209.1.220.133)
> Origin incomplete, localpref 1000, valid, internal
> 3561 5511 8584 8584 8584 13264 13264 13264 1833 1833 1299 2686 3339 4148
> 4148 4148 4148
> 209.1.40.141 from 209.1.40.141 (209.1.40.141)
> Origin incomplete, localpref 1000, valid, internal
> 3561 5511 8584 8584 8584 13264 13264 13264 1833 1833 1299 2686 3339 4148
> 4148 4148 4148
> 209.1.220.40 from 209.1.220.40 (209.1.220.40)
> Origin incomplete, localpref 1000, valid, internal
> 3561 5511 8584 8584 8584 13264 13264 13264 1833 1833 1299 2686 3339 4148
> 4148 4148 4148
> 209.1.220.66 from 209.1.220.66 (209.1.220.66)
> Origin incomplete, localpref 1000, valid, internal
> 3561 5511 8584 8584 8584 13264 13264 13264 1833 1833 1299 2686 3339 4148
> 4148 4148 4148
> 209.1.220.242 from 209.1.220.242 (209.1.220.242)
> Origin incomplete, localpref 1000, valid, internal
> 701 5511 8584 8584 8584 13264 13264 13264 1833 1833 1299 2686 3339 4148
> 4148 4148 4148
> 209.1.40.129 from 209.1.40.129 (209.1.40.129)
> Origin incomplete, localpref 1000, valid, internal
> 701 5511 8584 8584 8584 13264 13264 13264 1833 1833 1299 2686 3339 4148
> 4148 4148 4148
> 209.1.220.95 from 209.1.220.95 (209.1.220.95)
> Origin incomplete, localpref 1000, valid, internal
> 701 5511 8584 8584 8584 13264 13264 13264 1833 1833 1299 2686 3339 4148
> 4148 4148 4148
> 209.1.40.233 from 209.1.40.233 (209.1.40.233)
> Origin incomplete, localpref 1000, valid, internal
> 701 5511 8584 8584 8584 13264 13264 13264 1833 1833 1299 2686 3339 4148
> 4148 4148 4148
> 209.1.220.116 from 209.1.220.116 (209.1.220.116)
> Origin incomplete, localpref 1000, valid, internal
> 701 5511 8584 8584 8584 13264 13264 13264 1833 1833 1299 2686 3339 4148
> 4148 4148 4148
> 209.1.40.52 from 209.1.40.52 (209.1.40.52)
> Origin incomplete, localpref 1000, valid, internal
> 701 5511 8584 8584 8584 13264 13264 13264 1833 1833 1299 2686 3339 4148
> 4148 4148 4148
> 209.1.40.63 from 209.1.40.63 (209.1.40.63)
> Origin incomplete, localpref 1000, valid, internal
> 701 5511 8584 8584 8584 13264 13264 13264 1833 1833 1299 2686 3339 4148
> 4148 4148 4148
> 209.1.220.194 from 209.1.220.194 (209.1.220.194)
> Origin incomplete, localpref 1000, valid, internal
> 701 5511 8584 8584 8584 13264 13264 13264 1833 1833 1299 2686 3339 4148
> 4148 4148 4148
> 209.1.220.107 from 209.1.220.107 (209.1.220.107)
> Origin incomplete, localpref 1000, valid, internal
> 701 5511 8584 8584 8584 13264 13264 13264 1833 1833 1299 2686 3339 4148
> 4148 4148 4148
> 209.1.40.201 from 209.1.40.201 (209.1.40.201)
> Origin incomplete, localpref 1000, valid, internal
>
>
> As you can see, a more specific route, aka, 192.117.120.0/21 is being
> advertised to the world. Since this is the case, all Israeli ISPs will
> chose their international links in order to reach ftp.iglu.org.il (or
> whatever is on 192.117.12[0-7].[0-255] (that is 192.117.120.0/21).
>
> This needs to be fixed by actcom. Notice that the route abroad also ends
> at "3339 4148", which means "AT&T Actcom". A typical tracroute to
> ftp.iglu.org.il from Machba looks like:
>
> traceroute to ftp.iglu.org.il (192.117.122.34), 30 hops max, 38 byte
> packets
> 1 c6509-16 (132.66.17.254) 0.754 ms 0.195 ms 0.196 ms
> 2 * * *
> 3 tel-aviv (132.66.4.1) 1.251 ms 1.214 ms 1.329 ms
> 4 gp1-tau-mag.ilan.net.il (128.139.203.22) 182.786 ms 428.374 ms
> 209.165 ms
> 5 gp0-gp1-mag.ilan.net.il (128.139.203.2) 5.291 ms 5.244 ms 5.445 ms
> 6 iucc.uk1.uk.geant.net (62.40.103.165) 82.088 ms 81.640 ms 101.985
> ms
> 7 infonet-gw.uk1.uk.geant.net (62.40.103.154) 83.478 ms 104.166 ms
> 106.163 ms
> 8 london2.gb.eqip.net (195.90.64.26) 87.079 ms 83.050 ms 83.517 ms
> 9 linx1nap-1-3.lo.uk.attglobal.net (152.158.20.153) 85.725 ms 103.142
> ms 106.300 ms
> 10 lond1br2.lo.uk.prserv.net (152.158.20.2) 154.515 ms 239.567 ms
> 232.633 ms
> 11 152.158.76.66 (152.158.76.66) 168.594 ms 179.948 ms 173.235 ms
> 12 b2-tavi1br2.tlv.att.net.il (192.116.177.229) 167.451 ms 149.785 ms
> 179.351 ms
> 13 * * *
>
>
> --Ariel
>
> --
> Ariel Biener
> e-mail: ariel@post.tau.ac.il
> PGP(6.5.8) public key http://www.tau.ac.il/~ariel/pgp.html
>
>
> =================================================================
> To unsubscribe, send mail to linux-il-request@linux.org.il with
> the word "unsubscribe" in the message body, e.g., run the command
> echo unsubscribe | mail linux-il-request@linux.org.il
>
>
>
> ----- End forwarded message -----
=================================================================
To unsubscribe, send mail to linux-il-request@linux.org.il with
the word "unsubscribe" in the message body, e.g., run the command
echo unsubscribe | mail linux-il-request@linux.org.il