[c-nsp] Too dumb for SLB on ASR1Ks?

[Elmar K. Bins]

illcritikz at gmail.com (Ben Steele) wrote:

> What part exactly doesn't work? just the load balancing? do you have IP
> connectivity ok to your real servers? how is that virtual IP being sent to
> the box? it's not listed anywhere in your configuration on how 10.10.237.x
> gets to the box.

This is the lab setup; you can count on routing being alright - connectivity
among all parts of the setup is working, and I reconfigured the servers
myself (UNIX guys usually get netmasks etc. wrong *g*). You can also see
this from the drop-in replacement (7201) working perfectly in the setup.

The point is that the ASR receives the packets but doesn't push them on.
They do not appear in any statistics (SLB or port) and they do not appear
on the wire or on the target server.

There are two things that would help my cause, one being an idea whether
someone else successfully or unsuccessfully used SLB on ASRs (or the info
about serious trouble there). Then I'd like to compare configs; maybe I
forgot some magic word.

There is no documentation for SLB on IOS XE to be found, so I'd be happy
about pointers towards recipes or HowTos, since 7*** configs don't seem
to work - provided it's not some crazy bug that keeps the ASR from
pushing the packets on.

Thanks for any insight,
			Elmar.




> On Sat, Apr 4, 2009 at 2:01 AM, Elmar K. Bins <elmi at 4ever.de> wrote:
> 
> > Maybe someone can point me to a document that helps me through - or
> > Rodney cuts in and tells me it's a bug ;)
> >
> > I have the following pretty simple (stripped down) configuration
> > which does work on a 7201 and does not work on the ASR1000...
> >
> > (Yes, on the ASR the interface has 0/0/0 instead of 0/0 *g*)
> >
> > 7201 image is 12.4(4)XD10 IPBase
> >
> > ASR1K image is a derivative of 12.2(33)XNB (experimental version with a
> > bugfix)
> > Tests with standard 12.2(33)XNB1 failed as well.
> > Feature set is AdvancedEnterpriseK9 on the ASR.
> > If there's a hint that work has been done on SLB in newer
> > releases, I'm willing to try that...
> >
> > Any idea very much appreciated here - I'm pretty much stuck
> > and am not sure whether I'm looking at my stupidity or a bug.
> >
> > Yours,
> >        Elmar.
> >
> >
> > ================================================================
> >
> > ip slb serverfarm FARM-DNS
> >  real 10.10.236.12
> >  inservice
> > !
> > ip slb vserver VS-DNS
> >  virtual 10.10.237.53 udp 53
> >  serverfarm FARM-DNS
> >  sticky 5
> >  idle 5
> >  delay 1
> >  inservice
> > !
> > ip slb vserver VS-DNS-TCP
> >  virtual 10.10.237.53 tcp dns
> >  serverfarm FARM-DNS
> >  sticky 10
> >  idle 10
> >  inservice
> > !
> > interface GigabitEthernet0/0
> >  no ip address
> >  load-interval 30
> >  duplex auto
> >  speed auto
> >  media-type sfp
> >  negotiation auto
> > !
> > interface GigabitEthernet0/0.701
> >  encapsulation dot1Q 701
> >  ip address 10.10.235.1 255.255.255.0
> > !
> > interface GigabitEthernet0/0.702
> >  encapsulation dot1Q 702
> >  ip address 10.10.236.1 255.255.255.0
> >
> > ================================================================