08-07-2006 01:48 AM - edited 03-03-2019 01:34 PM
hi
below is my F0/0 interface config..
please suggets me if any thing more which i can add in it. becos under my router i m using my C3750
plz check and suggets for perfection
interface FastEthernet0/0
ip address x.x.x.x 255.255.255.240 secondary
ip address a.a.a.a 255.255.255.240 secondary
ip address b.b.b.b 255.255.255.224 secondary
ip address c.c.c.c 255.255.255.224
duplex auto
speed auto
Thanks and regards
08-07-2006 02:05 AM
Hello,
depending on what you want to achieve, the config looks ok. Just be aware that there are a couple of caveats regarding secondary addressing such as that OSPF won't form adjacencies with secondary addresses.
If you just want to achieve extended connectivity for more than one subnet, the config is ok.
Regards,
GNT
08-07-2006 02:25 AM
hi
Thanks for the Ans
I have using static routes for all my subnets to connect each other,
Thanks
08-07-2006 04:44 AM
hi afzaalq...
your configuration is okay... but first of all check it out your requirement for the configuring the secondary ip address to the interface... because in some cases secondary IP addresses are not usefull ...condition like...
problems,
if any, with secondary addresses occur mainly in conjunction with routing protocols, such as OSPF, which cannot establish adjacencies on secondary addresses. Other than that, you can add as many as the software allows you to. I guess the reason why multiple secondary addresses are being used, rather than multiple logical interfaces, is that you do not have to bother with trunking, inter-VLAN routing etc. when using secondary addressing. It is just a simple way of being able to add more hosts. I would be careful, though, to not add to many hosts, since that, and especially with regard to VoIP, can cause problems with delay and dropped packets, which VoIP usually doesn't handle very well.
so please first of all check out your requirement...
rate this post if it helps
regards
Devang
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