7. Check for suboptimal routing paths. When redistributing between routing protocols or routing sources, it is important to consider the metric or cost of the routes being advertised. Ensure that the routes being advertised have appropriate metrics to prevent suboptimal routing paths.
By following these troubleshooting steps, you can identify and resolve issues with redistribution between any routing protocols or routing sources.
1.5 Troubleshoot manual and auto-summarization with any routing protocol
Manual and auto-summarization are techniques used to control the size of routing tables by summarizing or aggregating networks into larger prefixes. Here are some steps to troubleshoot manual and auto-summarization with any routing protocol:
1. Check the configuration of manual and auto-summarization. Verify that the summarization configuration is correct and that the correct routing protocols and networks are being summarized.
2. Verify that the routers are exchanging routing information correctly. Check for connectivity between routers, and ensure that the correct routing updates are being sent and received.
3. Check the routing table on each router. Verify that the routing table is populated with the expected routes, and that the summarization process is working correctly.
4. Use debug commands to troubleshoot summarization issues. Debugging can provide valuable information about routing protocol behavior and can help to identify configuration errors or network connectivity problems.
5. Verify that manual summarization is configured correctly. Ensure that the summarized network includes all the necessary subnets and that it is being advertised to the correct interfaces.
6. Verify that auto-summarization is enabled or disabled correctly. Auto-summarization can be enabled or disabled for each routing protocol. Verify that the correct setting is enabled or disabled for the desired routing protocols.
7. Check for suboptimal routing paths. When summarizing networks, it is important to consider the impact on routing paths. Ensure that the summarized network does not create suboptimal routing paths.
By following these troubleshooting steps, you can identify and resolve issues with manual and auto-summarization with any routing protocol.
1.6 Configure and verify policy-based routing
Policy-based routing (PBR) is a technique used to selectively route traffic based on policies that are defined by the network administrator. Here are the steps to configure and verify policy-based routing:
1. Define the policies. Identify the traffic that needs to be routed based on specific criteria, such as the source IP address, destination IP address, protocol, port, or other criteria. Define the policies that will be used to route the traffic based on the identified criteria.
2. Configure the policy-based routing. Create a route map that matches the policies defined in step 1, and then apply the route map to the desired interface using the ip policy route-map command.
3. Verify the configuration. Use the show ip policy command to verify that the policy-based routing configuration is correct and that the desired policies are being applied to the traffic.
4. Test the policy-based routing. Test the policy-based routing by sending traffic that matches the policies defined in step 1 and verifying that it is being routed correctly.
5. Troubleshoot policy-based routing. If there are any issues with policy-based routing, use debug commands and show commands to troubleshoot the issues.
6. Monitor policy-based routing. Monitor policy-based routing to ensure that it is functioning correctly and to identify any potential issues before they become critical.
By following these steps, you can configure and verify policy-based routing to selectively route traffic based on policies defined by the network administrator.
