What happens to a static route entry in a routing table when the outgoing interface is not available?

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• About This Document
• Security Declaration
• Routine Maintenance
• Using the Troubleshooting Insights for Fault Diagnosis and Rectification
• Troubleshooting: Common Fault Diagnostic Commands and Methods
• Troubleshooting: Layer 2 Loop
• Troubleshooting: Ethernet Interface Physically Down
• Troubleshooting: Packet Loss on the Network
• Troubleshooting: IP Address Obtaining Failure
• Troubleshooting: Device Reboot or Card Reset
• Troubleshooting: Administrators' AAA Authentication Issues
• Troubleshooting: Access Authentication Issues
• Troubleshooting: Wireless Access Authentication Issues
• Troubleshooting: Ping Failure
• Troubleshooting: Attack Defense
• Troubleshooting: High CPU Usage
• Troubleshooting: PD Power-on Failures
• Troubleshooting: Miscellaneous Issues
• FAQs
  • Hardware
  • License
  • Password
  • Basic Configuration
  • Device Management
  • Interface Management
  • Ethernet
  • IP Services
    • Why Cannot an Interface Go Up When the IPv6 over IPv4 Tunnel Is Configured but Goes Up After the Automatic Tunnel Is Changed to the Manual Tunnel?
    • Why Does a Ping with Large Ping Packets Fail When an S Series Switch Is Connected to an NE Router?
    • Are Packets on the Forwarding Plane and Control Plane Fragmented on S Series Switches?
    • Does the Switch Filter PPPoE and MPLS Packets Based on UDP Port Numbers?
    • Why Are Some ARP Entries Not Updated in a Timely Manner After an Active/Standby Interface Switchover Is Performed When S Series Switches Set Up Dual-Link Backup Networking with Non-Huawei Devices?
    • What Are the Other Impacts After the reset arp static Command Is Run to Clear ARP Entries?
    • What Should I Check First If Packet Loss Occurs When a Switch Pings the Gateway IP Address?
    • Why Is the Internet Access Speed Slow After the S5700-10P-LI Is Switched from a Layer 2 Forwarding Device to a Layer 3 Gateway?
    • Why Does a Switch Receive a Reply Packet After It Pings a Network ID (Network Address)?
    • Do Huawei Switches Support NAT?
    • How Do I Configure Outbound NAT to Enable Private Network Users to Access the Internet?
    • How Do I Configure NAT Server to Enable Internet Users to Access Private Servers?
    • If High CPU Usage Occurs on the mDNS Gateway, How Can I Solve the Problem?
    • When a Fixed Switch and Modular Switch Are Connected, Why the Modular Switch Can Learn ARP Entries but the Fixed Switch Cannot?
    • Why Can a Switch Ping Other Devices When It Does Not Have a Return Route Configured and Does not Have Any ARP Entries?
    • Why Cannot ARP Entries Be Learned Correctly When a Lot of ARP Entries Exist?
    • Why Is the Semi-dynamic ARP Configuration of IP+MAC+VID Lost After the Switch Is Upgraded to V200R001?
    • Why Do a Large Number of ARP Entries Exist on VLANIF Interfaces of the Switch?
    • Why Cannot a Switch Forward Incoming Traffic from an Upstream Device That Performs an Active/Standby Switchover?
    • Why Cannot a Device Learn the ARP Entries of Directly Connected PCs?
    • What Are the Aging Time and Aging Mechanism of ARP Entries?
    • Why Proxy ARP Does Not Take Effect After the arp-proxy enable Command Is Used on an Interface?
    • When a Switch Uses the ping Command with a Source IP Address Specified to Ping the Peer Device, the Ping Fails. If the Source IP Address Is Changed, the Ping Succeeds. Why?
    • When Other Devices Ping Switches, Packet Loss Occurs When the Speed of Ping Is Fast, and Packet Loss Stops When the Running Speed Is Low. Why?
    • What Is Fast ICMP Reply? When Does It Need to Be Enabled? How Fast Can It Be?
    • Route Redirection Is Configured on the Local Device When No Reachable Route to the Destination Address Exists, but Packets Are Sent to the CPU. Why?
    • Why Cannot the undo icmp host-unreachable send Command Take Effect?
    • Can a Switch Reply to a Ping Request with a Broadcast Destination Address?
    • Why Does Not the MTU Configuration Take Effect on Tunnel Interfaces of a Switch?
    • When Both the DHCP Server and Relay Functions Are Enabled on an Interface, Which Function Is Processed Preferentially?
    • When the Switch Functions as a DHCP Server, What Are Precautions for Configuring Option 3 in DHCP Reply Packets?
    • How Can I Withdraw the Invalid DHCP Server IP Address When It Cannot Be Automatically Cleared?
    • Why Cannot a Fixed Switch Functioning as a DHCP Client Detect IP Address Conflict?
    • After the DHCP Command Is Executed Globally or on an Interface, the Command Is Displayed in the Configuration File but Does Not Take Effect. Why?
    • Why CPU Usage Becomes High When the Switch Functions as a DHCP Relay Agent to Request IP Addresses for Users on Multiple Network Segments?
    • Why Cannot a User Obtain an IP Address After Changing the Location in the DHCP Snooping Networking
    • Does the DHCP Relay Support Round Robin on the device?
    • When Should the DHCP Server Start to Ping the DHCP Client?
    • How Are Addresses Assigned and How Can I Set the Address Status to Idle?
    • DHCP Is Enabled on the Switch. When I Remove the Network Cable Connecting the PC and the Switch and Reinstall the Network Cable Again, the PC Obtains an IP Address Slowly. Why?
    • Does the device Support TFTP (Option 66) and Bootfile Name (Option 67) Attributes of DHCP?
    • Does a DHCP Address Pool Support Static Binding Between IP and MAC Addresses? What Are the Precautions?
    • Which Versions of DHCP Servers Can Send the Option Required by the Client to the Client When a Switch Functions as a DHCP Server and the Client Requests the Server to Reply with an Option?
    • Why Addresses in the IP Address Pool on a Switch Are Exhausted When the Switch Functions as a DHCP Server and It Has a Few Clients?
    • Does the DHCPv6 Relay Support PD-Relay?
    • When the Device Functions as a DHCPv6 Relay Agent, Why Cannot a PC Go Online?
  • Security
  • Qos
    • When an Authentication-Free Rule and a Traffic Policy Are Both Configured, Why Cannot the Traffic Policy Take Effect?
    • Why Does the remark 8021p Command Fail to Re-mark the 802.1p Priority in the Inner VLAN Tag in QinQ Packets?
    • How Do I Configure a Traffic Policy to Match Both IPv4 and IPv6 ACLs?
    • Why Does Not the Traffic Policy Take Effect When Two Pairs of Traffic Classifiers and Traffic Behaviors Are Configured in a Traffic Policy and One Pair of the Traffic Classifier and Traffic Behavior Matches a User-defined ACL?
    • Why Cannot Packets Forwarded at Layer 3 Be Redirected to a Firewall?
    • Why Does a Traffic Policy Not Take Effect on the S5720?
    • Why Cannot the display acl Command Display the Statistics of Packets Matching an ACL for Complex Traffic Classification?
    • Why Does the System Prompt "Error: The policy is empty" When a Traffic Policy Is Applied?
    • Do Modular Switches Support Access Control, Redirection, Rate Limiting, and Port Mirroring in the Outbound Direction?
    • How Does the Action of the ACL Referenced by a Traffic Policy Take Effect?
    • Why Cannot the IP Address in a GRE or MPLS Payload Be Matched on Modular Switches?
    • Why Cannot the ICMP Packets Used to Ping a Host Be Discarded by a Traffic Policy?
    • Why a Fixed Switch Learns the MAC Address in the Original VLAN After the traffic-remark vlan-id Command Is Configured?
    • Why an ACL Applied to the Outbound Direction Cannot Define the Port Number Range?
    • Can 802.1p Re-marking and Traffic Statistics Collection Both Be Configured in a Traffic Policy?
    • Why ACL Rule Update May Cause Instant Traffic Interruption?
    • Why Do Mirrored Packets on an Outbound Interface Not Reflect Modification in Outbound ACLs or QoS Parameters?
    • Why the display acl resource Command Output Shows that Two ACL Rules Are Occupied After one Traffic Policy Is Configured?
    • Why Does a Traffic Policy Containing User-defined ACL Rules Fail to Be Applied?
    • Why Information About VLAN Conflict Is Displayed When a Traffic Policy Is Configured in a VLAN?
    • Why the Traffic Policy That Contains an ACL Defining range port-start port-end Fails to Be Applied in the Outbound Direction of a Switch?
    • What Is the Difference Between an ACL-based Simplified Traffic Policy and an MQC-based Traffic Policy and Can They Be Applied Simultaneously?
    • How Do Traffic Policies Take Effect If They Are Applied in Different Views?
    • When Both QinQ and Traffic Policy-based VLAN Stacking Are Configured on an Interface, Which Configuration Takes Effect?
    • Why the 802.1p Priority Re-marking Action in an ACL Does Not Take Effect?
    • Does the remark 8021p or remark dscp Command Modify the Local Priority and Contents of Incoming Packets on an Interface?
    • Why Does the Priority Field in an Outgoing Mirrored Packet Remain Unchanged After Priority Mapping Is Configured?
    • What Is the Priority of Protocol Packets Sent by the Control Plane on the Switch?
    • Why DSCP Priorities in Outgoing Packets Obtained Through Port Mirroring Are Different from Those in Sent Packets?
    • Why Does the trust dscp Command Not Take Effect on the Switch Functioning as a PE?
    • What Is the Relationship Between the CIR and the CBS During the Rate Limit Configuration on a Switch?
    • How Do I Configure Aggregated CAR on a Modular Switch?
    • After a Traffic Policy Is Applied Globally on a Switch, Rate Limiting Does Not Take Effect When the Traffic Policy Is Applied to an Interface?
    • How Does Level-2 Aggregated CAR Take Effect on Modular Switches?
    • Why Is the Rate Limit Implemented Using CAR Inaccurate During Tests?
    • Can Rate Limit Be Set to a Bandwidth Percentage on an Interface?
    • Can Reserved Bandwidth Be Configured for Outbound Packets on an Interface?
    • When the traffic-limit Command Is Configured in the Inbound Direction and the qos lr Command Is Configured on the Fixed Switch, the Rate Limit Is Inaccurate. Why?
    • Why Rate Limiting for Incoming TCP Packets Is Inaccurate?
    • Why Does an Inbound Traffic Policy Fail to Filter Traffic or Limit Rate of Packets on Modular Switches?
    • A Traffic Policy Containing Rate Limiting Is Configured Globally and on an Interface. When There Are Remaining Meter Resources, the System Displays a Message About Insufficient Resources. Why?
    • How Do I Increase the Buffer Size for a Queue on a Port of a Fixed Switch?
    • Why CPU Usage Becomes High or Even Login Fails When a Traffic Behavior in a Traffic Policy Defines Permit on a Fixed Switch?
    • A Traffic Policy Defining Permit Is Applied to the Fixed Switch, and the Received Packets Matching the Traffic Policy Are Sent to the CPU at the Rate Higher Than CPCAR. Why?
    • How Do I Implement TCP Unidirectional Access?
    • Do the Modular Switches Support Inter-Card Redirection? How Do I Configure This Function?
    • Why Does the Fixed Switch Fail to Redirect Packets with Unreachable Destination Addresses Through Redirection to the Next Hop?
    • After a Non-configured Fixed Switch Connects to the Internet, the CPU Usage Is High. Why?
    • Why Packets Are Lost When a Fast ICMP Reply Test Is Performed on the Switch?
  • IP Routing
    • How Can I Determine Whether a Router ID Conflict Occurs?
    • What Are the Processing Mechanisms of the OSPF Preferred Route and Equal-Cost Routes?
    • FAQ-LSWPR-46658 What Are the Precautions for the Source Interface and Source Address When the peer connect-interface Command Is Run?
    • What Do DR, BDR, and DR Other in OSPF Mean? What Are the Rules for Electing a DR?
    • What Is the Function of Route Tag in OSPF?
    • What Is the Interval for Updating the LSAs Advertised by an OSPF Router?
    • What Is the Function of the DN Bit in OSPF LSAs?
    • How Can I Configure an OSPF Router ID and Obtain the Default Route ID?
    • Why Communication with the Destination Network Fails After a Route to the Destination Network Is Configured on a Device?
    • Does the switch Support the Weighted Load Balancing Mode?
    • Why a Neighbor Is Displayed on the Switch but Is Not Displayed on the Other Switch After the RIP Relationship Is Set Up Between the Two Switches?
    • How Does an LPU Process the Receive Routing Packets?
    • What Is the Function of Blackhole Routes and How to Configure Blackhole Routes?
    • Why the Static Route Is Not Displayed in the display ip routing-table Command Output After the Static Route Is Configured on the switch?
    • Why Some Routing Policies Are Invalid for Certain Routing Protocols?
    • Why an Error Message Is Displayed When the Network Command Is Used to Advertise Network Segment Routes in RIP?
    • Why Routes Imported in IS-IS Are Invalid?
    • Why Does an IS-IS Level-1 Neighbor Relationship Fail to Be Set Up?
    • How to Determine Whether FIB Entries Exceed the Specifications?
    • Can the Next Hop Address Be Not Specified in a Static Route?
    • How Is the Source IP Address of Ping Packets Specified?
    • How Can I Identify the Cause When an OSPF Neighbor Relationship Stays in Exstart/Exchange State for a Long Time?
    • Why Does the Switch Not Select a Direct Route as the Optimal Route?
    • A Switch Can Be Pinged Although No Return Route Is Available, Why?
    • Why Do Static Routes Imported to OSPF Fail to Take Effect?
    • What Is the Purpose of an OSPF Route Tag?
    • Why Cannot the Router ID of the System Changed by Using the router id Command Take Effect in BGP?
    • Why Does BGP Attempt to Establish Connections over 30 Seconds After the Peer Is Configured?
    • What Are the Advantages of Using the Loopback Address to Establish BGP Peer Relationship?
    • Why Does One BGP End Send the Open Packet Twice Sometimes?
    • How to Set the Durations of the Hold Timer and Keepalive Timer of the BGP Peer?
    • Why Is Not the BGP Connection Disconnected Immediately After the shutdown Command Is Run on Either Interface Between Two Devices?
    • Why Is the BGP Connection with the Same Peer in the VPNv4 Address Family Disconnected After the BGP Connection with a Peer in the Unicast Address Family Is Reset by Using the reset bgp ipv4-address Command?
    • Why Do Egress Policies Configured on the RR Not Take Effect?
    • Must Two Interfaces Reside on the Same Network Segment and Have the Same Subnet Mask Digits to Establish an OSPF Neighbor Relationship?
    • Must All the Devices on an OSPF NBMA Network Be Fully Meshed?
    • Must the IP Addresses of Interfaces on the Two Ends of a P2P Link Be on the Same Network Segment?
    • What Does the ToS Field in an OSPF LSA Mean?
    • What Does the OSPF LSA Refresh Interval Mean? How Long Is the LSA Refresh Interval?
    • When OSPF Imports External Routes to Generate Type 5 LSAs (ASE LSAs) or Type 7 LSAs (NSSA LSAs), What Are the Rules of Filling in the Forwarding Address?
    • When OSPF Imports Routes as Type 5 LSAs, What Is the Function of the Input Forwarding Address?
    • What is the LSA Retransmit Interval? How to Set it?
    • What Is the Function of the Interface MTU in OSPF Database Description (DD) Packets, and How to Configure it?
    • What Is the Purpose of a Domain ID?
    • What Is the Purpose of a Tag in an ASE-LSA and NSSA-LSA?
    • What Is the Purpose of Setting the DN Bit in an OSPF LSA?
    • What Is an OSPF Sham Link and What Is the Function of an OSPF Sham Link?
    • How Does OSPF Filter Received Routes?
    • How Can an OSPF Route Be Hidden so that It Is Not Advertised to Any Other Area?
    • Two Areas Are Configured and the Total Costs of Two Routes Learnt from These Two Areas Are the Same. However, No ECMP Route Be Generated. Why?
    • How Can Faster OSPF Convergence Be Achieved?
    • Can a Full Neighbor Relationship Be Established if the Network Types of the Two Ends of an OSPF Link Are Different?
    • Why Cannot OSPF Inter-Area Route Summarization Take Effect?
    • Why Are the Routes with Smaller Costs Passing Through the Backbone Area Not Preferred?
    • Can the OSPF Network Type Be Configured As P2P or NBMA?
    • Two Switches Are Interconnected Through One Link. After the Shutdown Command Is Run on One of the Switches, Why Does the Original LSA Still Exist in the LSDB on the Peer?
    • Why Does Not an LSDB Display Imported External Routes?
    • Why Does an ABR Advertise Continuous Network Segment Addresses of an Area as a Summary Address?
    • Why Cannot an OSPF Route that Exists in the LSDB Be Found in the Routing Table?
    • After MIB Parameters Are Configured on the MIB Browser and Device, the MIB Browser Connection Fails and the OSPF MIB Cannot Be Displayed Normally. Why?
    • Why Cannot the Standby Card Restart Through GR after a Switchover to the Standby Card?
    • How Long Is the Default GR Interval of the OSPF Protocol?
    • Why Are the VPN Routes Learnt from the Peer Incorrect?
    • Why Are IGP-Shortcut and Forwarding-Adjacency Forward Tunnel Interfaces Not Advertised?
    • Can an OSPF Neighbor Relationship Be Established Between Devices that Are on Different Subnets?
    • What Commands Can Be Used to Obtain Common OSPF Information?
    • What Commands Can Be Used to Obtain Information About OSPF Network Connections?
    • What Commands Are Used to Obtain Information About the OSPF Routing Table?
    • What Commands Are Used to Obtain Information About the OSPF Network Type?
    • Why Is the OSPF Default Cost Incorrect?
    • Under What Conditions Is the Status of OSPF Set to Invalid Adv?
    • Why Does the ASBR Generate No Equal-Cost Route?
    • Why Cannot OSPF Import BGP Routes?
    • What Is the Difference Between Unplanned GR and Planned GR?
    • Are the MTUs in the DD Packets Exchanged to Establish an OSPF Neighbor Relationship Checked?
    • What Are the Destination Addresses of Various Packets Sent by Interfaces with Different Network Types?
    • How to Determine that Configured OSPF Router IDs Conflict?
    • How to Determine that the IP Addresses of Interfaces in an OSPF Area Conflict?
    • The Local Device Advertises a Host Route with a 24-bit Mask of a Loopback Interface to Its Neighbor. Why Is the Mask Length of the Route in the Routing Table of the Neighbor Changed to 32 Bits?
    • Why Is an OSPF Neighbor Relationship Established Slowly (One Minute) on a Broadcast Network with a Few Routes?
    • Why Are the OSPF Routes in the Routing Table in the Inactive State?
    • Why Does the Interface of an OSPF Process Have Different Statuses Simultaneously?
    • Why Cannot OSPF P2P Interfaces on a Partial-Ring Network Establish an OSPF Neighbor Relationship?
    • What Does RFC 1583 Compatibility Mean?
    • In What Cases Does an OSPF LSDB Have a Large Number of LSAs That Cannot Be Aged?
    • What Do OSPF Media Type, Link Type, and Network Type Mean? What Are the Relationships Between Them?
    • What Are Route Selection Rules If OSPF Imports External Routes with the Same Prefix?
    • Does IS-IS Support P2MP Interfaces?
    • In the display isis interface Command Output, Why the MTU on a Broadcast Network Is 1497 Bytes Whereas the MTU on a P2P Network Is 1500 Bytes?
    • What Are the Principles of DIS Election on a Broadcast Network?
    • What Types of cost-style Can Be Configured in an IS-IS Process and What Are Their Features?
    • What Are the Functions of IS-IS Timers and What Are Their Default Values?
    • Is IS-IS Applicable to the Network Where One CE Is Dual-Homed to Two PEs?
    • Three-Way Handshake Is Implemented on P2P Interfaces of an IS-IS Device, Why Does the Problem that the Local Device Is Up and the Remote Device Is Down Occur?
    • Why Is the Number of Routes Listed in the Routing Table Inconsistent with That Listed in the FIB After the Mechanism of Route Iteration as Required Is Adopted?
    • What Is the Difference Between the Static Route That Is Configured with Only the Next Hop and the Static Route That Is Configured with Both the Next Hop and Outbound Interface?
    • Why Cannot the Backup Information of a Static Route or a BGP Route Be Generated After IP FRR Is Configured?
    • Can a Public Route Be Iterated to the Tunnel?
    • What Are Rules for the Election and Update of Router IDs?
    • How to Select a Tunnel Among Multiple Tunnels Working in Load Balancing Mode?
    • Does the Configuration of an Active Static Route Still Exist When the Outbound Interface Status of the Static Route Goes Down?
  • IP Multicast
    • How Can S Series Switches Implement the VLAN-based Layer 2 Multicast Pre-join Function?
    • Do Multicast Devices on a Network Need to Be Configured with the Same Query Interval?
    • What Can I Do If IGMP Report Packets Cannot Be Forwarded When a Switch Has No Router Port?
    • How Do I Configure IGMP Snooping to Allow All Traffic on an Interface?
    • How Do I Filter IPTV Traffic of Users?
    • On Which Interfaces Does PIM Need to Be Enabled?
    • During the RPF Check on an SA Message, the MSDP Peer Receiving the SA Message Is Not the Optimal Next Hop to the RP. How Is the Problem Solved?
    • What Flags Are Commonly Used in a PIM Routing Table?
    • Can DRs on a PIM SM Network Change Dynamically?
    • How Does a Device Process Packets When No Rule Is Configured for the ACL Referenced in the Group Policy of Layer 2 Multicast?
    • Why the display igmp-snooping port-info or display l2-multicast forwarding-table Command Does Not Display the Router Port in Multicast Entries Sometimes?
    • Can a Switch Forward a Packet If the Source and Destination IP Addresses of the Packet Are Both Multicast Addresses?
    • Why Can Switches of V100R003 Generate Forwarding Entries After Receiving IGMPv2 Messages with SSM Group Addresses but Switches of V100R005 Cannot?
    • Can a Switch Accurately Forward Multicast Data Packets Through Layer 2 Interfaces If Only Layer 3 Multicast Is Configured?
    • Can a Switch Generate Forwarding Entries After Receiving IGMPv2 Report Messages If a Source Address Is Specified for a Channel During Controllable Multicast Configuration?
    • Why Does the Upstream Neighbor Receive the Query Message Sent by Itself After the Switch's Uplink Interface Joins a Multicast VLAN and User VLAN Simultaneously?
    • What Parameters Are Used in IGMP Snooping? What Are Their Default Values?
    • In What Situation Does a Switch Consider Layer 3 Multicast Enabled in a VLAN?
    • How Does a Switch Age Layer 3 Multicast Entries? Why Does an Entry Exist When No Traffic Matches the Entry?
    • How Is Convergence Accelerated When the Layer 2 Multicast Network Topology Changes?
    • How Does Layer 2 Multicast Send Query Messages to Re-collect Group Memberships When the Network Topology Changes?
    • What Are the Differences Between MAC Address-based and IP Address-based Multicast Forwarding and Does a Modular Switch Support the Two Modes?
    • What Are Unknown Multicast Flows and How They Are Processed by a Modular Switch?
    • List of Default General Query Interval Values
    • Why Does Each Multicast Group Have a (*, G) Entry and an (S, G) Entry in the Multicast Routing Table?
    • Why Cannot PIM Neighbor Relationships Be Set Up in a VPN After Multicast VLAN Is Configured on a Modular Switch?
    • When Layer 3 Multicast Forwarding Fails on a Switch, How Can I Determine Whether the Reason Is That the TTL Value of Multicast Data Packet Is 1?
    • Why Does a Switch Fail to Generate IGMP Group Membership Entries When It Can Receive IGMP Messages?
    • Will the Number of Multicast Forwarding Entries Supported on Each LPU Change When a Switch Has Different Types of LPUs Installed?
    • Why Is the Layer 3 Multicast Forwarding Entry Not Generated on Network Devices After Users Order Multicast Programs?
    • Why Does a Switch Fail to Generate Layer 3 Multicast Forwarding Entries When Receiving Multicast Data Packets with Destination IP Addresses in the SSM Group Address Range?
    • Why Does a Layer 3 Multicast Forwarding Entry Contain a Loopback Inbound Interface?
    • Why Does Multicast Data Forwarding Fail After PIM Is Configured and PIM Routing Entries are Generated on a Switch?
    • Why Is the IGMP Group Membership Not Generated on a Switch with Layer 3 Multicast Configured When a Requested Group Address Is a Reserved Group Address?
    • Does a Switch Participate in Querier Election After IGMP Snooping Querier Is Enabled?
    • Why Are Some Protocol Packets Fail to Be Transparently Transmitted After the multicast drop-unknown Command Is Configured on a Switch?
    • How Does a Switch Process an IGMP Message If the Message Version Is Later Than the IGMP Snooping Version Configured on the Switch?
    • Why Are Multicast Forwarding Entries Not Generated in User VLANs When the Multicast VLAN Is in Down State?
    • Can a Switch Send Report Messages in Response to Query Messages After IGMP Snooping Is Enabled?
    • What Should I Do When Multicast Forwarding Fails Because of Incomplete RP Information Learned by Switches on a PIM-SM Network?
    • Why Is Multicast Forwarding Interrupted on an Interface After the Interface Receives PIM Hello Messages?
    • Why Cannot a Multicast Distribution Tree Be Set Up Correctly If PIM Is Not Enabled on an RPF Interface?
    • Why Cannot an MDT Be Set Up Correctly If There Is No Unicast Route to the Multicast Source?
    • Why Cannot an RPT Be Set Up Correctly If Static RP Configurations on the Devices of the Entire Network Are Inconsistent?
    • What Are Differences Between a Querier and a PIM DR? Which One Is Responsible for Data Forwarding?
    • What Are Requirements for Configuring IGMP Parameters on Each Interface of the Devices on a Shared Network Segment?
    • Why Are (S, G) Entries Not Generated After SSM Mapping Is Enabled?
    • Can a Device Process the Report Messages Delivered After the Maximum Response Time Expires?
    • Why Does an SA Filtering Policy Fail to Take Effect on the MSDP Peer Originating SA Messages?
    • Why Cannot (S, G) Information Be Exchanged Though Anycast RP Is Configured?
    • Why Does the State of the MSDP Peer Keep Down Though the MSDP Peer Relationship Is Set Up?
    • Does a Device Preferentially Select the Route with the Highest Precedence Rather Than the Route with the Longest Matched Mask?
    • Does an Outbound Interface Functioning as a DR Stop Forwarding Multicast Data Immediately If It Changes to Be a Non-DR Because of Changed DR Priority After a PIM DR Switching Delay Is Set?
    • After an Interface Enabled with IGMP and PIM Has Created an IGMP Entry Based on a Received IGMP Report Message, Why Is There No Outbound Interface in the Corresponding PIM Entry?
    • What Are the Relationships Between a PIM Routing Table, a Multicast Routing Table, and a Multicast Forwarding Table?
    • Which Entries Do Layer 2 Multicast Have? What Are the Functions of These Entries?
    • Is It Necessary to Configure the Query Interval When IGMP Snooping Is Enabled but IGMP Snooping Querier Is Not Enabled in a VLAN?
    • Will a Switch Convert IGMPv2 Messages Into IGMPv3 Messages Before Forwarding the Messages to Router Ports If IGMP Snooping SSM Mapping Is Configured?
    • How Does a Switch Process IGMP Query Messages with a Unicast Destination MAC Address After Layer 2 Multicast Is Enabled?
    • Can the Hosts and Devices on the Same User Network Segment Run Different Versions of IGMP?
    • How Do Unicast Packets (Such as Register Packets and Graft Packets) of a Multicast Routing Protocol Pass an Mtunnel Interface Since an Mtunnel Interface Does Not Advertise Its Routes?
    • Why Does the (*, G) Entry on the Device in a Receiver's VPN Site Have No Upstream Interface?
    • Why Does Not the Source's DR Send Register Messages to the RP After Receiving Multicast Data Packets?
    • Why Does the Registration Interface Exist in Corresponding Multicast Forwarding Entry After the Source's DR Registers with the RP?
    • Why Is Multicast Forwarding Prone to Be Interrupted on a Device with Preferential Use of the Static RP Enabled?
    • Why Are Some Multicast Data Packets Lost When Users Start to Watch Video Programs?
    • Do Secondary IP Addresses on a Layer 3 Interface Support the PIM Protocol?
    • Why Is the Quality of Multicast Data Flows Received on User Hosts Poor When the Eth-Trunk Between Two Switches Allow All VLANs?
  • MPLS&VPN
  • Web System
  • Network Management and Monitoring
  • User Access and Authentication
  • Reliability
  • WLAN
• Contacting Huawei for Technical Support

Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).

The configured static route is not displayed in the display ip routing-table command output on the switch in the following scenarios:

• If the outbound interface of the static route is specified but the protocol status of the outbound interface is not Up, the static route does not take effect and the routing information is not displayed.
• If only the next hop address is specified and there is a route to the next hop address on the device, the static route takes effect. If there is no route from the device to the next hop address, the static route does not take effect. The static route is thus not displayed in the routing table.