If I had to guess it would probably just put it at the classfull boundary unless you specify a specific mask , which in your case would be 255.0.0.0 . Just do a show int vlan 1 and it will show you what mask it assigned .
Doing a show int vlan1 didn't show the ip information. When I added the IP address line on the vlan interface, the Ip netmask information showed correctly in show int vlan1.
Many of the examples in Cisco documentation concerning HSRP did not show entering the IP address, on the vlan interface, only the standby address. However, I could not do inter-vlan routing without the IP address specified on the vlan interface. The network did not show up in the routing table.
HSRP won't work on an interface without IP configured (?)--or at least it shouldn't. HSRP also doesn't care about the subnet mask in any way, it just assumes you are using the address you've listed as the default gateway on any hosts attached to the segment.
EIGRP won't pay any attention to the HSRP information, since EIGRP won't route to an HSRP address, etc. If you have two possible next hops across the same link, EIGRP will just build the right neighbor relationships, and install two routes in topology table, which will either result in load sharing, or having a backup route, normally.
[toc:faq]The ProblemOn traditional switches whenever we have a trunk
interface we use the VLAN tag to demultiplex the VLANs. The switch needs
to determine which MAC Address table to look in for a forwarding
decision. To do this we require the switch to do...
[toc:faq]Introduction:Netdr is a tool available on a RSP720, Sup720 or
Sup32 that allows one to capture packets on the RP or SP inband. The
netdr command can be used to capture both Tx and Rx packets in the
software switching path. This is not a substitut...
IntroductionOSPF, being a link-state protocol, allows for every router
in the network to know of every link and OSPF speaker in the entire
network. From this picture each router independently runs the Shortest
Path First (SPF) algorithm to determine the b...