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routing problem to ftp.iglu.org.il
- To: Israeli Linux Mailing List <linux-il(at-nospam)linux.org.il>
- Subject: routing problem to ftp.iglu.org.il
- From: Ariel Biener <ariel(at-nospam)fireball.tau.ac.il>
- Date: Sun, 25 Nov 2001 16:31:01 +0200 (IST)
- Delivered-To: linux.org.il-linux-il@linux.org.il
- Sender: linux-il-bounce(at-nospam)cs.huji.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
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