Re: Draft revision of RIPE-210: Coordinated Route Flap Damping Parameters

25 Apr 2001

      Hi John,

Thanks for the JunOS configuration snippet - really appreciated!

philip
--

At 15:47 24/04/2001 -0700, john heasley wrote:
...
Wed, Apr 25, 2001 at 02:35:20AM +1000, Philip Smith:
...
Hi,
bcc: nanog, apops, APNIC routing SIG, afnog
Please accept my apologies for any duplicates.
The attached is a proposed update and revision of the RIPE-210 Coordinated
Route Flap Damping Parameters document. The authors would welcome any
comments and feedback regarding the content of this document, either to
the
...
RIPE Routing Working Group, or at the RIPE meeting in Bologna, Italy, on
w/b 30th April.
We would also welcome links/sample configurations/examples for other 
router
platforms (specifically Juniper/Foundry/Extreme and any other platforms
which may be found in today's Internet) to augment the Cisco IOS
configuration examples given in the Appendix.
current juniper bits penilizes on withdraw and re-advertise, 1 flap == 2000.
protocols {
    /* Dont enable damping globally - we want it to just apply
       to our eBGP peers.
     */
    bgp {
        /* eBGP peer */
        group some-eBGP-peer {
            type external;
            damping;
            import [ graded-flap-dampening policy2 policy3 ... ];
        }
}
#
policy-options {
    /* List of root and global TLD nameservers */
    prefix-list golden-networks {
        /* RS D */
        128.8.0.0/16;
        /* RS B */
        128.9.0.0/16;
        /* RS H */
        128.63.0.0/16;
        /* RS F */
        192.5.4.0/23;
        /* gTLD A */
        192.5.6.0/24;
        /* gTLD E */
        192.12.94.0/24;
        /* gTLD C */
        192.26.92.0/24;
        /* gTLD D */
        192.31.80.0/24;
        /* RS C */
        192.33.4.0/24;
        /* gTLD F */
        192.35.51.0/24;
        /* gTLD I */
        192.36.144.0/24;
        /* RS I */
        192.36.148.0/24;
        /* gTLD L */
        192.41.162.0/24;
        /* gTLD G */
        192.42.93.0/24;
        /* RS G */
        192.112.36.0/24;
        /* RS E */
        192.203.230.0/24;
        /* RS K */
        193.0.14.0/24;
        /* RS L */
        198.32.64.0/24;
        /* RS A & J */
        198.41.0.0/24;
        /* RS M */
        202.12.27.0/24;
        /* gTLD M */
        202.153.112.0/20;
        /* gTLD B */
        203.181.96.0/19;
        /* gTLD J */
        210.132.96.0/19;
        /* gTLD K */
        213.177.192.0/21;
    }
    /* Define a damping policy. */
    policy-statement graded-flap-dampening {
        term exclude {
            from {
                prefix-list golden-networks;
            }
            then {
                damping set-none;
                next policy;
            }
        }
        from {
            route-filter 0.0.0.0/0 upto /21 damping set-normal;
            route-filter 0.0.0.0/0 upto /23 damping set-medium;
            route-filter 0.0.0.0/0 orlonger damping set-high;
        }
        then next policy;
    }
    damping set-high {
        half-life 30;
        reuse 1640;
        suppress 6000;
        max-suppress 60;
    }
    damping set-medium {
        half-life 15;
        reuse 1500;
        suppress 6000;
        max-suppress 45;
    }
    damping set-normal {
        half-life 10;
        reuse 3000;
        suppress 6000;
        max-suppress 30;
    }
    damping set-none {
        disable;
    }
}