From: Nadeem Ansari (nadeem.ansari574@gmail.com)
Date: Tue Mar 17 2009 - 04:37:39 ART
Hi Narbik,
As per my understanding BGP scan timer checks the next-hop reachibility for
BGP table by looking in to the routing table, and it checks for all address
family including IPv4 Unicast, IPv6 Unicast, VPNv4, etc.
correct me if I am wrong
Regards
Nadeem
On Tue, Mar 17, 2009 at 9:35 AM, Narbik Kocharians <narbikk@gmail.com>wrote:
> BGP scan-time takes care of conditional advertisement, Route Dampening and
> every 60 seconds (The default) it scans the entire BGP table and ensure
> that
> the next hop is reachable.
>
> On Mon, Mar 16, 2009 at 4:35 PM, naveen M S <navin.ms@gmail.com> wrote:
>
> > Looking at the master index, it is clear that ..
> >
> > 1) bgp scan-time .. is used for vpnv4 unicast routes
> > 2) bgp nexthop trigger delay .. is used for unicast, mcast, vpnv4 etc
> > routes.
> >
> > For Joe's task, "bgp nexthop trigger delay .." should be the right
> answer.
> >
> >
> >
> > On Mon, Mar 16, 2009 at 3:17 PM, M Lab <mlabccie@gmail.com> wrote:
> >
> > > I did find this in the Master Index....
> > >
> > >
> http://www.cisco.com/en/US/docs/ios/mcl/124mainlinemcl/124_01.html#LTR_B
> > >
> > > Which pointed me to mpls of all places...
> > >
> > >
> > >
> >
> http://www.cisco.com/en/US/docs/ios/mpls/command/reference/mp_a1.html#wp1011737
> > >
> > > I'm sure there is a logical reason, but I don't know what it is. ;-)
> > >
> > > On Mon, Mar 16, 2009 at 2:37 PM, <joe_astorino@comcast.net> wrote:
> > >
> > > > Anybody know where to find the documentation on this? I do not see it
> > > > listed in the IOS 12.4 mainline command reference under BGP. Also,
> can
> > > > anybody help differentiate the difference between the scan-time
> command
> > > and
> > > > the "bgp nexthop" command?
> > > >
> > > > I have a task that asks me "After every 15 seconds the router will
> > check
> > > to
> > > > see weather next-hops of installed prefixes are reachable" Since "bgp
> > > > scan-time" was not in the documentation, I thought an acceptable
> answer
> > > > would have been "bgp nexthop" as documented in the 12.4 command
> > reference
> > > > and shown below. However, the solution calls for "bgp scan-time 15"
> Has
> > > bgp
> > > > nexthop replaced bgp scan-time ????
> > > > I'm a bit confused.
> > > >
> > > >
> > > >
> > >
> >
> http://www.cisco.com/en/US/docs/ios/iproute/command/reference/irp_bgp1.html
> > > >
> > > > BGP next-hop address tracking is event driven. BGP prefixes are
> > > > automatically tracked as peering sessions are established. Next-hop
> > > changes
> > > > are rapidly reported to BGP as they are updated in the routing
> > > information
> > > > base (RIB). This optimization improves overall BGP convergence by
> > > reducing
> > > > the response time to next-hop changes for routes installed in the
> RIB.
> > > When
> > > > a best-path calculation is run in between BGP scanner cycles, only
> the
> > > > changes are processed and tracked.
> > > >
> > > >
> > > > Blogs and organic groups at http://www.ccie.net
> > > >
> > > >
> _______________________________________________________________________
> > > > Subscription information may be found at:
> > > > http://www.groupstudy.com/list/CCIELab.html
> > >
> > >
> > > Blogs and organic groups at http://www.ccie.net
> > >
> > > _______________________________________________________________________
> > > Subscription information may be found at:
> > > http://www.groupstudy.com/list/CCIELab.html
> >
> >
> > Blogs and organic groups at http://www.ccie.net
> >
> > _______________________________________________________________________
> > Subscription information may be found at:
> > http://www.groupstudy.com/list/CCIELab.html
> >
> >
> >
> >
> >
> >
> >
> >
>
>
> --
> Narbik Kocharians
> CCSI#30832, CCIE# 12410 (R&S, SP, Security)
> www.MicronicsTraining.com <http://www.micronicstraining.com/>
> www.Net-Workbooks.com <http://www.net-workbooks.com/>
> Sr. Technical Instructor
>
>
> Blogs and organic groups at http://www.ccie.net
>
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html
Blogs and organic groups at http://www.ccie.net
This archive was generated by hypermail 2.1.4 : Mon Apr 06 2009 - 06:44:05 ART