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Community Member

Default GW of the PC

Hi All,

Below is the network diagram. The users PC (R7) gw is the HSRP IP address 10.1.2.1. But when do tracert to the 172.16.16.1, it shows first hop as 10.1.2.2.

Network diagram:

default gw.jpg

Output:

R7#traceroute 172.16.16.1

Type escape sequence to abort.

Tracing the route to 172.16.16.1

  1 10.1.2.2 92 msec 172 msec 176 msec                   -------------------->R5 is primary router of the HSRP

  2 192.168.1.2 264 msec 184 msec 104 msec

  3 172.16.16.1 96 msec *  80 msec

R7#wr

Building configuration...

[OK]

R7#traceroute 172.16.16.1

Type escape sequence to abort.

Tracing the route to 172.16.16.1

  1 10.1.2.3 68 msec 36 msec 16 msec                ------>shutdown the R5

  2  *  *

    192.168.1.1 48 msec

  3 172.16.16.1 76 msec *  72 msec

R7#sh

R7#show ip

R7#show ip ro

R7#show ip route

R7#show ip route

Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP

       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area

       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2

       E1 - OSPF external type 1, E2 - OSPF external type 2

       i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2

       ia - IS-IS inter area, * - candidate default, U - per-user static route

       o - ODR, P - periodic downloaded static route

Gateway of last resort is 10.1.2.1 to network 0.0.0.0

     10.0.0.0/24 is subnetted, 1 subnets

C       10.1.2.0 is directly connected, FastEthernet0/0

S*   0.0.0.0/0 [1/0] via 10.1.2.1

R7#

Please let me know why the output shows the first hop as the physical IP and not the HSRP IP addresss. Is this the default behavior?

Please explain.

Regards,

Ravindra K

Everyone's tags (1)
1 ACCEPTED SOLUTION

Accepted Solutions

Re: Default GW of the PC

http://www.cisco.com/en/US/tech/tk648/tk362/technologies_q_and_a_item09186a00800a9679.shtml#tr

Please rate...

HTH, John *** Please rate all useful posts ***
3 REPLIES

Default GW of the PC

This is normal. The physical address responds when doing a traceroute.

HTH,

John

HTH, John *** Please rate all useful posts ***
Community Member

Default GW of the PC

ok. Thanks. A little explanation on this behavior will be more helpful.

Regards,

Ravindra K

Re: Default GW of the PC

http://www.cisco.com/en/US/tech/tk648/tk362/technologies_q_and_a_item09186a00800a9679.shtml#tr

Please rate...

HTH, John *** Please rate all useful posts ***
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