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Configuring PPP Services

2-14

308639-14.00 Rev 00

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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