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Cisco Bug: CSCur36898 - EIGRP tag incorrectly send by ASA

Last Modified

Aug 06, 2018

Products (1)

  • Cisco ASA 5500-X Series Firewalls

Known Affected Releases

9.2(2.7) 9.2(2.8) 9.3(1)

Description (partial)

Symptom:
ASA does not send the correct EIGRP TAG value to EIGRP neighbor.

If the EIGRP has a tag, the ASA will send this tag incorrectly to the neighbor device.

For example, the local asa with problem the EIGRP tag value is 5000:

ASA1#  sh eigrp topology 10.10.10.0 255.255.255.0
EIGRP-IPv4 Topology Entry for AS(1)/ID(13.13.13.1) for 10.10.10.0 255.255.255.0
  State is Passive, Query origin flag is 1, 1 Successor(s), FD is 2560000512
  Descriptor Blocks:
  13.13.13.3 (router), from 13.13.13.3, Send flag is 0x0
      Composite metric is (2560000512/2560000256), route is External
      Vector metric:
        Minimum bandwidth is 1 Kbit
        Total delay is 20 microseconds
        Reliability is 1/255
        Load is 1/255
        Minimum MTU is 256
        Hop count is 1
      External data:
        Originating router is 192.168.10.1
        AS number of route is 0
        External protocol is Connected, external metric is 0
        Administrator tag is 5000 (0x00001388)

But the remote device will RECEIVE the "Administrator tag" value incorrect:

ASA2# sh eigrp topology 10.10.10.0 255.255.255.0
EIGRP-IPv4 (AS 1): Topology Default-IP-Routing-Table(0) entry for 10.10.10.0 255.255.255.0
  State is Passive, Query origin flag is 1, 1 Successor(s), FD is 2560000768
  Routing Descriptor Blocks:
  12.12.12.1 (link), from 12.12.12.1, Send flag is 0x0
      Composite metric is (2560000768/2560000512), Route is External
      Vector metric:
        Minimum bandwidth is 1 Kbit
        Total delay is 30 microseconds
        Reliability is 1/255
        Load is 1/255
        Minimum MTU is 1
        Hop count is 2
      External data:
        Originating router is 192.168.10.1
        AS number of route is 0
        External protocol is Connected, external metric is 0
        Administrator tag is 2282946560 (0x88130000)

Conditions:
ASA running 9.2.2.7, 9.2.2.8, 9.3.1
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