Frame Relay and ATM support a single bit that can be set for QoS purposes, but these single bits are intended for a very strict use related to drop probability. Frames or cells with these bits set to 1 are considered to be better candidates to be dropped than frames or cells without the bit set to 1. Named the Frame Relay Discard Eligibility (DE) bit and the ATM Cell Loss Priority (CLP) bit, these bits can be set by a router, or by an ATM or Frame Relay switch. Router and sw..
Potential Problems With Redistribution
Redistribution is not optimal. The simpler and more straightforward the design, the better managed and more stable the network, which means fewer errors and faster convergence. A hierarchical IP addressing scheme designed to allow continued network growth, combined with a single IP routing protocol that has the scope to support growth, results in a strong, reliable, and fast network. However, it is rare to find a network of any size that runs only one IP routing protocol. Whe..
Figure 4-9 shows a small, sample network that is used in this section to show basic IPv6 connectivity using global addresses. Figure 4-9 Sample Dual-Stack IPv4/IPv6 Network The routers use dual stacks (both IPv4 and IPv6 addresses are assigned to the interfaces) for this network. Hosts with dual stacks (running both IPv4 and IPv6) would be able to send IPv4 or IPv6 packets, and the routers could accommodate either. This relatively simple example of IPv6 uses global address..
Configuring Support for Autonomous APs
Figure 15-19 shows a network scenario where one autonomous AP is connected into a campus network. Autonomous APs are normally positioned in the access layer of the network. Each SSID that is supported by the AP is mapped to a VLAN; when multiple SSIDs are offered, multiple VLANs must touch the AP. Therefore, you should configure the switch port connecting to the AP as a trunk link. You can use the commands shown in Example 15-1 as a template to configure the switch por..
The Cisco IOS software only supports the Frame Relay SVC feature on a Cisco router as a DTE device. The Frame Relay switching enhancement feature currently does not support SVC switching functionalities. Presently, only PVC switching is supported. There are commercial Frame Relay switches by different vendors that support Frame Relay SVC switching. Check with your service provider about SVC support when ordering a Frame Relay SVC circuit. Frame Relay SVC is supported on both..
