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sims
sims
Explorer II
September 9, 2019
Question

Destination Host Unreachable

  • September 9, 2019
  • 1 reply
  • 9955 views
Hi,

When I am pinging I am getting randomly   "Vr HL TOS  Len   ID Flg  off TTL Pro  cks      Src      Dst" .

Why is that and How to stop 

 

ping 10.0.5.9

PING 10.0.5.9 (10.0.5.9): 56 data bytes

Request timeout for icmp_seq 0

Request timeout for icmp_seq 1

Request timeout for icmp_seq 2

92 bytes from fw1(10.0.2.1): Destination Host Unreachable

Vr HL TOS  Len   ID Flg  off TTL Pro  cks      Src      Dst

 4  5  00 5400 558e   0 0000  3e  01 b57f 10.0.7.100  10.0.5.9 

 

92 bytes from fw1(10.0.2.1): Destination Host Unreachable

Vr HL TOS  Len   ID Flg  off TTL Pro  cks      Src      Dst

 4  5  00 5400 d868   0 0000  3e  01 32a5 10.0.7.100  10.0.5.9 

 

92 bytes from fw1(10.0.2.1): Destination Host Unreachable

Vr HL TOS  Len   ID Flg  off TTL Pro  cks      Src      Dst

 4  5  00 5400 612c   0 0000  3e  01 a9e1 10.0.7.100  10.0.5.9 

 

Request timeout for icmp_seq 3

Request timeout for icmp_seq 4

Request timeout for icmp_seq 5

Request timeout for icmp_seq 6

 

Thanks

    1 reply

    OneOfUs
    OneOfUs
    New Member
    September 9, 2019

    How is the firewall learning the route to the destination network (10.0.5.9)?  Off hand, it looks like it could be a flapping route.  If it's dynamic look for messages relating to the routing protocol (BGP / OSPF) if static, make sure you are not seeing interface drops.

     

    When the ping is failing make sure you see the route in the Route Monitor or from the CLI type:

    get router info routing-table all

    - or - 

    get router info routing-table details 10.0.5.9

     

    sims
    simsAuthor
    Explorer II
    September 9, 2019

    Hi,

    Thanks for the reply . I  can see the route in the routing table . The host actually does not exist . 

    But I don't know why it showing the mentioned messages 

    Thanks

     

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