They could be doing something as simple as you're doing, i.e. two static routes. Although instead of using the default, they would normally route to your assigned Internet address block. Additionally, your block of address space is probably injected into dynamic routing protocol within the ISP. The ISP will then either advertise it or a larger address block to the Internet.
Since you're only using one router with dual links, usually an individual flow won't be able to obtain more than one link's worth of bandwidth. Also, two flows may, or may not, use both links. I.e. One link could be congested while the other isn't. If you're actually connected to a single ISP router too, you might inquire whether you could use something like MPPP.
[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...