[nsp] Secondary IP address not seen
Terry Brown
Terry Brown" <terry.brown@datanet-it.com
Tue, 30 Jul 2002 14:55:08 +0100
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Guys,
Can anyone offer an explanation for the following: -
I have allocated a secondary IP address to a FastEthernet interface on =
my 7204 router running IOS 12.1 using the following command: -
"ip address x.x.x.x x.x.x.x secondary"
[The interface is running HSRP on the primary address but not on the =
secondary]
I have an IP helper on the interface to my DHCP server.
I have created an additional superscope on the DHCP server so that I can =
have 500+ IP addresses on the same wire.
The problem is I cannot see the secondary IP address from the network =
(cannot ping it from a client machine or even from the router itself). =
If I do a show run the interface has accepted the address. If I ping the =
broadcast address for the secondary subnet I get a response from all IP =
addresses on both the primary and the secondary subnets. If I manually =
edit a client PC with an IP address from the secondary range but use the =
primary address gateway as the default then the machine can communicate =
over the network., but if I allocate the default gateway as the =
secondary IP address on the interface the client cannot see it??
Any ideas guys?
Regards
Tel
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<DIV><FONT face=3DArial size=3D2>Guys,</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>Can anyone offer an explanation for the =
following:=20
-</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>I have allocated a secondary IP address =
to a=20
FastEthernet interface on my 7204 router running IOS 12.1 using the =
following=20
command: -</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV> "ip address x.x.x.x x.x.x.x secondary"</DIV>
<DIV> </DIV>
<DIV><FONT face=3DArial size=3D2>[The interface is running HSRP on the =
primary=20
address but not on the secondary]</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=3DArial size=3D2> I have an IP helper on the =
interface to my=20
DHCP server.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>I have created an additional superscope =
on the DHCP=20
server so that I can have 500+ IP addresses on the same =
wire.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>The problem is I cannot see the =
secondary IP=20
address from the network (cannot ping it from a client machine or =
even from=20
the router itself). If I do a show run the interface has accepted the =
address.=20
If I ping the broadcast address for the secondary subnet I get a =
response from=20
all IP addresses on both the primary and the secondary subnets. If I =
manually=20
edit a client PC with an IP address from the secondary range but use the =
primary=20
address gateway as the default then the machine can communicate =
over the=20
network., but if I allocate the default gateway as the secondary IP =
address on=20
the interface the client cannot see it??</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>Any ideas guys?</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>Regards</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>Tel</FONT></DIV></BODY></HTML>
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