
Configuring PPP Services
2-14 117360-A Rev. A
Figure 2-4 shows a configuration that uses the multilink feature.
Figure 2-4. Multilink Circuit
As Figure 2-4 shows, a bundle is a logical connection between two routers. Once
you have configured a circuit for multilink or bandwidth-on-demand operation, it
always uses PPP multilink encapsulation.
All lines in a circuit must negotiate and perform multilink. You cannot pair
non-multilink lines with multilink lines in a circuit. Multilink can resequence
packets sent over different lines of the link. PPP supports packet fragmentation
and reassembly, as described in the section “Using Multilink Fragmentation” on
page 2-16.
You can use the multilink feature over the following physical media:
• V.35
• MCT1/MCE1
• ISDN-B channel drivers
• Raise-DTR modems
• V.25bis modems
PPP0005A
Circuit
LAN LAN
Bundle with 2 links
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