This standard specifies low-end router interface characteristic testing, WAN protocol testing, PPP protocol stack testing, TCP/IP protocol stack testing, and routing protocol testing. Test methods for multicast routing Xiehan test, management function test and performance test. All references to "routers" in the text of this standard refer to low-end routers that support IPv4. This standard is suitable for testing low-end routers. In this standard: Required: Indicates that this test item or item must be tested. Recommendation: Indicates that this test item or entry should normally be tested. Optional: Indicates that this test item or item may or may not be tested. All specific configurations in this standard are only used to illustrate the problem and are not the actual configurations during testing.