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[zzarko <zzarko@xxxxxxxxx>]

5 is a Cisco ruter, 17 is a Debian machine.

Router (17) has special privileges regarding web access on our network,
that (5) doesn't have. That is the reason we have two of them.

I don't know when this started to happend, but this was found out today
during some network troubleshooting by my friend. If you need more
details, I'll ask him to join (he knows a lot more than me about
networking).

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https://bugs.launchpad.net/bugs/1411350

Title:
  routing table does not show dynamic routes

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  Dynamic routes gotten from ICMP-redirect message are not shown in the
  routing table.

  Here is an example from my network:
  My default router is 147.91.174.17 which had sent back ICMP-redirect packet to change route to 147.91.174.5

  $route
  Kernel IP routing table
  Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
  default         147.91.174.17   0.0.0.0         UG    0      0        0 eth0
  147.91.174.0    *               255.255.255.0   U     1      0        0 eth0
  $netstat -rt
  Kernel IP routing table
  Destination     Gateway         Genmask         Flags   MSS Window  irtt Iface
  default         147.91.174.17   0.0.0.0         UG        0 0          0 eth0
  147.91.174.0    *               255.255.255.0   U         0 0          0 eth0
  $ ip route show
  default via 147.91.174.17 dev eth0  proto static 
  147.91.174.0/24 dev eth0  proto kernel  scope link  src 147.91.174.16  metric 1 

  But packets to certain hosts are routed to a different router:
  # ip route get 82.94.219.115
  82.94.219.115 via 147.91.174.5 dev eth0  src 147.91.174.16 
      cache <redirected>

  As you can see,  route to 147.91.174.5 is not listed in the main
  routing table.

  Is this a bug or expected behaviour?

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-generic 3.13.0.43.50
  ProcVersionSignature: Ubuntu 3.13.0-43.72-generic 3.13.11.11
  Uname: Linux 3.13.0-43-generic x86_64
  NonfreeKernelModules: fglrx
  ApportVersion: 2.14.1-0ubuntu3.6
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  zzarko     1969 F.... pulseaudio
   /dev/snd/controlC0:  zzarko     1969 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Thu Jan 15 18:34:11 2015
  HibernationDevice: RESUME=UUID=33a09d3d-d43f-4755-acee-21f923268c1b
  InstallationDate: Installed on 2014-07-14 (185 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
  IwConfig:
   eth0      no wireless extensions.
   
   lo        no wireless extensions.
  MachineType: Hewlett-Packard HP Compaq Elite 8300 CMT
  ProcFB: 0 VESA VGA
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-43-generic root=UUID=93f74578-9c5b-4ef0-a3e0-f29949715269 ro
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-43-generic N/A
   linux-backports-modules-3.13.0-43-generic  N/A
   linux-firmware                             1.127.11
  RfKill:
   
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 07/16/2013
  dmi.bios.vendor: Hewlett-Packard
  dmi.bios.version: K01 v02.90
  dmi.board.asset.tag: CZC4231W0V
  dmi.board.name: 3396
  dmi.board.vendor: Hewlett-Packard
  dmi.chassis.asset.tag: CZC4231W0V
  dmi.chassis.type: 3
  dmi.chassis.vendor: Hewlett-Packard
  dmi.modalias: dmi:bvnHewlett-Packard:bvrK01v02.90:bd07/16/2013:svnHewlett-Packard:pnHPCompaqElite8300CMT:pvr:rvnHewlett-Packard:rn3396:rvr:cvnHewlett-Packard:ct3:cvr:
  dmi.product.name: HP Compaq Elite 8300 CMT
  dmi.sys.vendor: Hewlett-Packard

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