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Cisco Bug: CSCuo55268 - EIGRP Bandwidth calculation failed when using Multilink

Last Modified

Mar 01, 2018

Products (1)

  • Cisco IOS

Known Affected Releases

15.0(1)S2

Description (partial)

Symptom:
EIGRP BW is different that the one on the Multilink interface after a reload.

Router#show ppp multi int multilink205

Multilink205
  Bundle name: ROUTER2
  Remote Endpoint Discriminator: [1] ROUTER2
  Local Endpoint Discriminator: [1] ROUTER
  Bundle up for 00:23:48, total bandwidth 7936, load 1/255                   <<<<<<<<<<<<<<<<<<
  Receive buffer limit 48000 bytes, frag timeout 1000 ms
    0/0 fragments/bytes in reassembly list
    0 lost fragments, 2 reordered
    0/0 discarded fragments/bytes, 0 lost received
    0x13F received sequence, 0x184 sent sequence
  Member links: 4 active, 0 inactive (max 16, min not set)
    Se0/0/0:0, since 00:23:48
    Se1/3/5:0, since 00:23:47
    Se1/3/7:0, since 00:23:47
    Se1/3/6:0, since 00:23:45




ROUTER#sh ip eigrp topology 10.111.4.242 255.255.255.255
EIGRP-IPv4 Topology Entry for AS(124)/ID(10.111.5.8) for 10.111.4.242/32
  State is Passive, Query origin flag is 1, 1 Successor(s), FD is 942080
  Descriptor Blocks:
  0.0.0.0, from Rstatic, Send flag is 0x0
      Composite metric is (942080/0), route is Internal
      Vector metric:
        Minimum bandwidth is 5952 Kbit                   <<<<<<<<<<<<<<<<<<
        Total delay is 20000 microseconds
        Reliability is 255/255
        Load is 1/255
        Minimum MTU is 1500
        Hop count is 0
        Originating router is 10.111.5.8

Conditions:
EIGRP route known via a Multilink.
As several links associated with Multilink come up at different time, Final BW reported by EIGRP for static routes with nexthop as Multilink are seen with bandwidth lesser than actual.
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