[c-nsp] Why only 10 has buckets?

Peter Kranz pkranz at unwiredltd.com
Fri May 15 18:02:13 EDT 2015 

C6506-E running Sup2T.. I was under the impression there were more than 10
hash buckets available? I can't seem to generate anycast load balancing over
10 destinations.. Here is an example with 20 paths where CEF only inserts
10..

 

rtr-sungard#sho ip cef 208.76.31.254 internal

208.76.31.254/32, epoch 8, flags rib only nolabel, rib defined all labels,
RIB[B], refcount 6, per-destination sharing

  sources: RIB, Adj 

  feature space:

   Broker: linked

   NetFlow: Origin AS 65009, Peer AS 0, Mask Bits 0

   IPRM: 0x00018000

  subblocks:

   Adj source: IP adj out of Vlan10, addr 208.76.31.254 2C4D49E0

    Dependent covered prefix type adjfib cover 208.76.31.0/24

  ifnums:

   Vlan10(20): 162.244.60.50, 162.244.60.51, 162.244.60.52, 162.244.60.53

               162.244.60.54, 162.244.60.55, 162.244.60.56, 162.244.60.57

               162.244.60.58, 162.244.60.59, 162.244.60.60, 162.244.60.61

               162.244.60.62, 162.244.60.63, 162.244.60.64, 162.244.60.65

               162.244.60.66, 162.244.60.67, 162.244.60.68, 162.244.60.69

  path 675395F4, path list 27D7F6F8, share 1/1, type recursive nexthop, for
IPv4, flags resolved

  recursive via 162.244.60.50[IPv4:Default], fib 6C189DF4, 1 terminal fib

    path 6753A644, path list 27D808D8, share 1/1, type adjacency prefix, for
IPv4

    attached to Vlan10, adjacency IP adj out of Vlan10, addr 162.244.60.50
2C4D5880

  path 67539A7C, path list 27D7F6F8, share 1/1, type recursive nexthop, for
IPv4, flags resolved

  recursive via 162.244.60.51[IPv4:Default], fib 6C184B44, 1 terminal fib

    path 67539254, path list 27D80390, share 1/1, type adjacency prefix, for
IPv4

    attached to Vlan10, adjacency IP adj out of Vlan10, addr 162.244.60.51
2C4D5A20

  path 675398AC, path list 27D7F6F8, share 1/1, type recursive nexthop, for
IPv4, flags resolved

  recursive via 162.244.60.52[IPv4:Default], fib 5C1EC38C, 1 terminal fib

    path 6753B280, path list 27D807A0, share 1/1, type adjacency prefix, for
IPv4

    attached to Vlan10, adjacency IP adj out of Vlan10, addr 162.244.60.52
2C4D5BC0

  path 67539F04, path list 27D7F6F8, share 1/1, type recursive nexthop, for
IPv4, flags resolved

  recursive via 162.244.60.53[IPv4:Default], fib 5C1EC23C, 1 terminal fib

    path 6753A400, path list 27D809A8, share 1/1, type adjacency prefix, for
IPv4

    attached to Vlan10, adjacency IP adj out of Vlan10, addr 162.244.60.53
2C4D5D60

  path 67538C70, path list 27D7F6F8, share 1/1, type recursive nexthop, for
IPv4, flags resolved

  recursive via 162.244.60.54[IPv4:Default], fib 2B7C0DCC, 1 terminal fib

    path 6753A970, path list 27D80B48, share 1/1, type adjacency prefix, for
IPv4

    attached to Vlan10, adjacency IP adj out of Vlan10, addr 162.244.60.54
2C4D5F00

  path 675391E0, path list 27D7F6F8, share 1/1, type recursive nexthop, for
IPv4, flags resolved

  recursive via 162.244.60.55[IPv4:Default], fib 2AD09878, 1 terminal fib

    path 6753A888, path list 27D80D50, share 1/1, type adjacency prefix, for
IPv4

    attached to Vlan10, adjacency IP adj out of Vlan10, addr 162.244.60.55
2C4D60A0

  path 675397C4, path list 27D7F6F8, share 1/1, type recursive nexthop, for
IPv4, flags resolved

  recursive via 162.244.60.56[IPv4:Default], fib 5F228B64, 1 terminal fib

    path 6753A1BC, path list 27D80EF0, share 1/1, type adjacency prefix, for
IPv4

    attached to Vlan10, adjacency IP adj out of Vlan10, addr 162.244.60.56
2C4D6240

  path 67539B64, path list 27D7F6F8, share 1/1, type recursive nexthop, for
IPv4, flags resolved

  recursive via 162.244.60.57[IPv4:Default], fib 1D623CC8, 1 terminal fib

    path 6753A4E8, path list 27D80C18, share 1/1, type adjacency prefix, for
IPv4

    attached to Vlan10, adjacency IP adj out of Vlan10, addr 162.244.60.57
2C4D63E0

  path 6753A318, path list 27D7F6F8, share 1/1, type recursive nexthop, for
IPv4, flags resolved

  recursive via 162.244.60.58[IPv4:Default], fib 5837CE50, 1 terminal fib

    path 6753AA58, path list 27D80AE0, share 1/1, type adjacency prefix, for
IPv4

    attached to Vlan10, adjacency IP adj out of Vlan10, addr 162.244.60.58
2C4D7420

  path 6753933C, path list 27D7F6F8, share 1/1, type recursive nexthop, for
IPv4, flags resolved

  recursive via 162.244.60.59[IPv4:Default], fib 1BD00500, 1 terminal fib

    path 6753AD84, path list 27D80600, share 1/1, type adjacency prefix, for
IPv4

    attached to Vlan10, adjacency IP adj out of Vlan10, addr 162.244.60.59
2C4D6580

  path 675390F8, path list 27D7F6F8, share 1/1, type recursive nexthop, for
IPv4, flags resolved

  recursive via 162.244.60.60[IPv4:Default], fib 243196A4, 1 terminal fib

    path 53BC20CC, path list 14C36BD0, share 1/1, type adjacency prefix, for
IPv4

    attached to Vlan10, adjacency IP adj out of Vlan10, addr 162.244.60.60
2C4D6720

  path 6753AD10, path list 27D7F6F8, share 1/1, type recursive nexthop, for
IPv4, flags resolved

  recursive via 162.244.60.61[IPv4:Default], fib 6C187A84, 1 terminal fib

    path 67539CC0, path list 27D80DB8, share 1/1, type adjacency prefix, for
IPv4

    attached to Vlan10, adjacency IP adj out of Vlan10, addr 162.244.60.61
2C4D56E0

  path 6753A230, path list 27D7F6F8, share 1/1, type recursive nexthop, for
IPv4, flags resolved

  recursive via 162.244.60.62[IPv4:Default], fib 5D3616C8, 1 terminal fib

    path 6753AB40, path list 27D80CE8, share 1/1, type adjacency prefix, for
IPv4

    attached to Vlan10, adjacency IP adj out of Vlan10, addr 162.244.60.62
2C4D5540

  path 6753A2A4, path list 27D7F6F8, share 1/1, type recursive nexthop, for
IPv4, flags resolved

  recursive via 162.244.60.63[IPv4:Default], fib 6306FA24, 1 terminal fib

    path 6753A55C, path list 27D80A10, share 1/1, type adjacency prefix, for
IPv4

    attached to Vlan10, adjacency IP adj out of Vlan10, addr 162.244.60.63
2C4D53A0

  path 67539FEC, path list 27D7F6F8, share 1/1, type recursive nexthop, for
IPv4, flags resolved

  recursive via 162.244.60.64[IPv4:Default], fib 1F8877F0, 1 terminal fib

    path 6753ADF8, path list 27D80940, share 1/1, type adjacency prefix, for
IPv4

    attached to Vlan10, adjacency IP adj out of Vlan10, addr 162.244.60.64
2C4D5200

  path 6753B4C4, path list 27D7F6F8, share 1/1, type recursive nexthop, for
IPv4, flags resolved

  recursive via 162.244.60.65[IPv4:Default], fib 58D55638, 1 terminal fib

    path 6753A9E4, path list 27D80668, share 1/1, type adjacency prefix, for
IPv4

    attached to Vlan10, adjacency IP adj out of Vlan10, addr 162.244.60.65
2C4D5060

  path 6753B9C0, path list 27D7F6F8, share 1/1, type recursive nexthop, for
IPv4, flags resolved

  recursive via 162.244.60.66[IPv4:Default], fib 5D3694C8, 1 terminal fib

    path 6753A6B8, path list 27D80FC0, share 1/1, type adjacency prefix, for
IPv4

    attached to Vlan10, adjacency IP adj out of Vlan10, addr 162.244.60.66
2C4D4EC0

  path 28011AAC, path list 27D7F6F8, share 1/1, type recursive nexthop, for
IPv4, flags resolved

  recursive via 162.244.60.67[IPv4:Default], fib 1DFD3BD8, 1 terminal fib

    path 6753B694, path list 27D80188, share 1/1, type adjacency prefix, for
IPv4

    attached to Vlan10, adjacency IP adj out of Vlan10, addr 162.244.60.67
2C4D4D20

  path 28010DFC, path list 27D7F6F8, share 1/1, type recursive nexthop, for
IPv4, flags resolved

  recursive via 162.244.60.68[IPv4:Default], fib 6C18A1E4, 1 terminal fib

    path 675393B0, path list 27D80120, share 1/1, type adjacency prefix, for
IPv4

    attached to Vlan10, adjacency IP adj out of Vlan10, addr 162.244.60.68
2C4D4B80

  path 28011B20, path list 27D7F6F8, share 1/1, type recursive nexthop, for
IPv4, flags resolved

  recursive via 162.244.60.69[IPv4:Default], fib 22BAB6E8, 1 terminal fib

    path 67539920, path list 27D80E20, share 1/1, type adjacency prefix, for
IPv4

    attached to Vlan10, adjacency IP adj out of Vlan10, addr 162.244.60.69
2C4D4840

  output chain:

    loadinfo 53BB6B24, per-session, 10 choices, flags 0003, 5 locks

    flags: Per-session, for-rx-IPv4

    10 hash buckets

      < 0 > IP adj out of Vlan10, addr 162.244.60.50 2C4D5880

      < 1 > IP adj out of Vlan10, addr 162.244.60.51 2C4D5A20

      < 2 > IP adj out of Vlan10, addr 162.244.60.52 2C4D5BC0

      < 3 > IP adj out of Vlan10, addr 162.244.60.53 2C4D5D60

      < 4 > IP adj out of Vlan10, addr 162.244.60.54 2C4D5F00

      < 5 > IP adj out of Vlan10, addr 162.244.60.55 2C4D60A0

      < 6 > IP adj out of Vlan10, addr 162.244.60.56 2C4D6240

      < 7 > IP adj out of Vlan10, addr 162.244.60.57 2C4D63E0

      < 8 > IP adj out of Vlan10, addr 162.244.60.58 2C4D7420

      < 9 > IP adj out of Vlan10, addr 162.244.60.59 2C4D6580

    Subblocks:

     None

 

Peter Kranz
www.UnwiredLtd.com <http://www.unwiredltd.com/> 
Desk: 510-868-1614 x100
Mobile: 510-207-0000
pkranz at unwiredltd.com <mailto:pkranz at unwiredltd.com>

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