H3C Routers

Basic BGP Configuration Examples

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Contents

Introduction· 1

Prerequisites· 1

Example: Configuring basic BGP·· 1

Network configuration· 1

Analysis· 1

Software versions used· 1

Restrictions and guidelines· 2

Procedures· 2

Configuring IP addresses for interfaces· 2

Configuring IBGP· 3

Configuring EBGP· 4

Configure Router B to advertise the routes to local networks· 6

Verifying the configuration· 7

Configuration files· 7

Router A· 7

Router B· 7

Router C· 8

Examples: Configuring BGP and IGP route redistribution· 9

Network configuration· 9

Analysis· 9

Software versions used· 9

Restrictions and guidelines· 9

Procedures· 9

Configuring IP addresses for interfaces· 9

Configuring OSPF· 10

Configuring EBGP· 11

Configuring BGP and IGP route redistribution: 11

Verifying the configuration· 12

Configuration files· 14

Router A· 14

Router B· 14

Router C· 15

Related documentation· 15

 

Introduction

This document provides basic BGP configuration examples.

Prerequisites

The following information applies to Comware 9-based routers. Procedures and information in the examples might be slightly different depending on the software or hardware version of the routers.

The configuration examples were created and verified in a lab environment, and all the devices were started with the factory default configuration. When you are working on a live network, make sure you understand the potential impact of every command on your network.

The following information is provided based on the assumption that you have basic knowledge of BGP.

Example: Configuring basic BGP

Network configuration

As shown in Figure 1, all routers run BGP. Run EBGP between Router A and Router B, and run IBGP between Router B and Router C so that Router C can access subnet 8.1.1.0/24, which is connected to Router A.

Figure 1 Network diagram

‌

Analysis

To enable Router B to communicate with Router C through loopback interfaces, enable OSPF in AS 65009.

By default, BGP does not advertise local networks. To enable Router C to access subnet 8.1.1.0/24 connected directly to Router A, perform the following tasks:

·     Add network 8.1.1.0/24 to the BGP routing table of Router A.

·     Add networks 3.1.1.0/24 and 9.1.1.0/24 to the BGP routing table of Router B.

Software versions used

This configuration example was created and verified on R9141P16 of the MSR2630E-X1 device.

Restrictions and guidelines

When you configure basic BGP, follow these restrictions and guidelines:

·     Use loopback interfaces to establish IBGP connections to prevent route flapping caused by port state changes.

·     Loopback interfaces are virtual interfaces. Use the peer connect-interface command to specify the loopback interface as the source interface for establishing BGP connections.

·     The EBGP peers, Router A and Router B, are located in different ASs. Typically, their loopback interfaces are not reachable to each other, so the routers use directly connected interfaces to establish EBGP sessions.

Procedures

Configuring IP addresses for interfaces

# Configure IP addresses for Loopback 0, GigabitEthernet 1/0/1, and GigabitEthernet 1/0/2 on Router A.

<RouterA> system-view

[RouterA] interface loopback 0

[RouterA-LoopBack0] ip address 1.1.1.1 255.255.255.255

[RouterA-LoopBack0] quit

[RouterA] interface gigabitethernet 1/0/1

[RouterA-GigabitEthernet1/0/1] port link-mode route

[RouterA-GigabitEthernet1/0/1] ip address 3.1.1.2 255.255.255.0

[RouterA-GigabitEthernet1/0/1] quit

[RouterA] interface gigabitethernet 1/0/2

[RouterA-GigabitEthernet1/0/2] port link-mode route

[RouterA-GigabitEthernet1/0/2] ip address 8.1.1.1 255.255.255.0

[RouterA-GigabitEthernet1/0/2] quit

# Configure IP addresses for Loopback 0, GigabitEthernet 1/0/1, and GigabitEthernet 1/0/2 on Router B.

<RouterB> system-view

[RouterB] interface loopback 0

[RouterB-LoopBack0] ip address 2.2.2.2 255.255.255.255

[RouterB-LoopBack0] quit

[RouterB] interface gigabitethernet 1/0/1

[RouterB-GigabitEthernet1/0/1] port link-mode route

[RouterB-GigabitEthernet1/0/1] ip address 3.1.1.1 255.255.255.0

[RouterB-GigabitEthernet1/0/1] quit

[RouterB] interface gigabitethernet 1/0/2

[RouterB-GigabitEthernet1/0/2] port link-mode route

[RouterB-GigabitEthernet1/0/2] ip address 9.1.1.1 255.255.255.0

[RouterB-GigabitEthernet1/0/2] quit

# Configure IP addresses for Loopback 0 and GigabitEthernet 1/0/2 on Router C.

<RouterC> system-view

[RouterC] interface loopback 0

[RouterC-LoopBack0] ip address 3.3.3.3 255.255.255.255

[RouterC-LoopBack0] quit

[RouterC] interface gigabitethernet 1/0/2

[RouterC-GigabitEthernet1/0/2] port link-mode route

[RouterC-GigabitEthernet1/0/2] ip address 9.1.1.2 255.255.255.0

[RouterC-GigabitEthernet1/0/2] quit

Configuring IBGP

1.     Configure Router B.

# Set the router ID of Router B to 2.2.2.2 in BGP view.

[RouterB] bgp 65009

[RouterB-bgp] router-id 2.2.2.2

# Create IBGP peer 3.3.3.3, and then specify Loopback 0 as the source interface for TCP connection to the IBGP peer.

[RouterB-bgp] peer 3.3.3.3 as-number 65009

[RouterB-bgp] peer 3.3.3.3 connect-interface loopback 0

# Create and enter BGP IPv4 unicast address family view, and then enable Router B to exchange IPv4 unicast routing information with peer 3.3.3.3.

[RouterB-bgp] address-family ipv4 unicast

[RouterB-bgp-ipv4] peer 3.3.3.3 enable

[RouterB-bgp-ipv4] quit

[RouterB-bgp] quit

# Configure OSPF settings on Router B.

[RouterB] ospf 1

[RouterB-ospf-1] area 0

[RouterB-ospf-1-area-0.0.0.0] network 2.2.2.2 0.0.0.0

[RouterB-ospf-1-area-0.0.0.0] network 9.1.1.0 0.0.0.255

[RouterB-ospf-1-area-0.0.0.0] quit

[RouterB-ospf-1] quit

2.     Configure Router C.

# Set the router ID of Router C to 3.3.3.3 in BGP view.

[RouterC] bgp 65009

[RouterC-bgp] router-id 3.3.3.3

# Create IBGP peer 2.2.2.2, and then specify Loopback 0 as the source interface for TCP connection to the IBGP peer.

[RouterC-bgp] peer 2.2.2.2 as-number 65009

[RouterC-bgp] peer 2.2.2.2 connect-interface loopback 0

# Create and enter BGP IPv4 unicast address family view, and then enable Router B to exchange IPv4 unicast routing information with peer 2.2.2.2.

[RouterC-bgp] address-family ipv4 unicast

[RouterC-bgp-ipv4] peer 2.2.2.2 enable

[RouterC-bgp-ipv4] quit

[RouterC-bgp] quit

# Configure OSPF settings on Router B.

[RouterC] ospf 1

[RouterC-ospf-1] area 0

[RouterC-ospf-1-area-0.0.0.0] network 3.3.3.3 0.0.0.0

[RouterC-ospf-1-area-0.0.0.0] network 9.1.1.0 0.0.0.255

[RouterC-ospf-1-area-0.0.0.0] quit

[RouterC-ospf-1] quit

3.     Verify that Router B and Router C has established an IBGP peer relationship.

# Display brief information about all BGP IPv4 unicast peers on Router C.

[RouterC] display bgp peer ipv4

 

 BGP local router ID : 3.3.3.3

 Local AS number : 65009

 Total number of peers : 1                 Peers in established state : 1

 

  Peer                    AS  MsgRcvd  MsgSent OutQ PrefRcv Up/Down  State

 

  2.2.2.2              65009        2        2    0       0 00:00:13 Established

The command output shows that Router B and Router C has established an IBGP peer relationship.

Configuring EBGP

1.     Configure Router A.

# Set the router ID of Router A to 1.1.1.1 in BGP view.

[RouterA] bgp 65008

[RouterA-bgp] router-id 1.1.1.1

# Create EBGP peer 3.1.1.1 in BGP view and set the AS number of the peer to 65009.

[RouterA-bgp] peer 3.1.1.1 as-number 65009

# Create and enter BGP IPv4 unicast address family view, and then enable Router A to exchange IPv4 unicast routing information with peer 3.1.1.1.

[RouterA-bgp] address-family ipv4 unicast

[RouterA-bgp-ipv4] peer 3.1.1.1 enable

# Add route 8.1.1.0/24 to the BGP routing table.

[RouterA-bgp-ipv4] network 8.1.1.0 24

[RouterA-bgp-ipv4] quit

[RouterA-bgp] quit

2.     Configure Router B.

# Create EBGP peer 3.1.1.2 in BGP view and set the AS number of the peer to 65008.

[RouterB] bgp 65009

[RouterB-bgp] peer 3.1.1.2 as-number 65008

# Create and enter BGP IPv4 unicast address family view, and then enable Router B to exchange IPv4 unicast routing information with peer 3.1.1.2.

[RouterB-bgp] address-family ipv4 unicast

[RouterB-bgp-ipv4] peer 3.1.1.2 enable

[RouterB-bgp-ipv4] quit

[RouterB-bgp] quit

3.     Verify the EBGP configuration.

# Display BGP peer information on Router B.

[RouterB] display bgp peer ipv4

 

 BGP local router ID : 2.2.2.2

 Local AS number : 65009

 Total number of peers : 2                 Peers in established state : 2

 

  Peer                    AS  MsgRcvd  MsgSent OutQ PrefRcv Up/Down  State

 

  3.3.3.3              65009        4        4    0       0 00:02:49 Established

  3.1.1.2              65008        2        2    0       0 00:00:05 Established

The command output shows that Router B has established an IBGP peer relationship with Router C and an EBGP peer relationship with Router A.

# Display the BGP routing table on Router A.

[RouterA] display bgp routing-table ipv4

 

 Total number of routes: 1

 

 BGP local router ID is 1.1.1.1

 Status codes: * - valid, > - best, d - dampened, h - history,

               s - suppressed, S - stale, i - internal, e - external

               Origin: i - IGP, e - EGP, ? – incomplete

 

     Network            NextHop         MED        LocPrf     PrefVal Path/Ogn

 

* >  8.1.1.0/24         8.1.1.1         0                     32768   i

# Display the BGP routing table on Router B.

[RouterB] display bgp routing-table ipv4

 

 Total number of routes: 1

 

 BGP local router ID is 2.2.2.2

 Status codes: * - valid, > - best, d - dampened, h - history,

               s - suppressed, S - stale, i - internal, e - external

               Origin: i - IGP, e - EGP, ? – incomplete

 

     Network            NextHop         MED        LocPrf     PrefVal Path/Ogn

 

* >e 8.1.1.0/24         3.1.1.2         0                     0       65008i

# Display the BGP routing table on Router C.

[RouterC] display bgp routing-table ipv4

 

 Total number of routes: 1

 

 BGP local router ID is 3.3.3.3

 Status codes: * - valid, > - best, d - dampened, h - history,

               s - suppressed, S - stale, i - internal, e - external

               Origin: i - IGP, e - EGP, ? – incomplete

 

     Network            NextHop         MED        LocPrf     PrefVal Path/Ogn

 

   i 8.1.1.0/24         3.1.1.2         0          100        0       65008i

According to the command outputs:

¡     Router A has learned no route to AS 65009.

¡     Router C has learned a route to subnet 8.1.1.0, but the next hop 3.1.1.2 is unreachable. As a result, the route is invalid.

Configure Router B to advertise the routes to local networks

# Create and enter BGP IPv4 unicast address family view.

[RouterB] bgp 65009

[RouterB-bgp] address-family ipv4 unicast

# Configure BGP to advertise the routes to local networks, so that Router A can obtain route 9.1.1.0/24 and Router C can obtain route 3.1.1.0/24.

[RouterB-bgp-ipv4] network 3.1.1.0 24

[RouterB-bgp-ipv4] network 9.1.1.0 24

[RouterB-bgp-ipv4] quit

[RouterB-bgp] quit

# Display the BGP routing table on Router A.

[RouterA] display bgp routing-table ipv4

 

 Total number of routes: 3

 

 BGP local router ID is 1.1.1.1

 Status codes: * - valid, > - best, d - dampened, h - history,

               s - suppressed, S - stale, i - internal, e - external

               Origin: i - IGP, e - EGP, ? – incomplete

 

     Network            NextHop         MED        LocPrf     PrefVal Path/Ogn

 

* >e 3.1.1.0/24         3.1.1.1         0                     0       65009?

* >  8.1.1.0/24         8.1.1.1         0                     32768   i

* >e 9.1.1.0/24         3.1.1.1         0                     0       65009i

The command output shows that route 9.1.1.0/24 has been added in Router A's routing table.

# Display the BGP routing table on Router C.

[RouterC] display bgp routing-table ipv4

Total number of routes: 3

 

 BGP local router ID is 3.3.3.3

 Status codes: * - valid, > - best, d - dampened, h - history,

               s - suppressed, S - stale, i - internal, e - external

               Origin: i - IGP, e - EGP, ? – incomplete

 

     Network            NextHop         MED        LocPrf     PrefVal Path/Ogn

 

* >i 3.1.1.0/24         2.2.2.2         0          100        0       ?

* >i 8.1.1.0/24         3.1.1.2         0          100        0       65008i

* >i 9.1.1.0/24         2.2.2.2         0          100        0       i

The output shows that route 8.1.1.0 becomes valid and its next hop is Router A.

Verifying the configuration

# Use the ping command to verify that Router C can reach 8.1.1.1.

[RouterC] ping 8.1.1.1

Ping 8.1.1.1 (8.1.1.1): 56 data bytes, press CTRL_C to break

56 bytes from 8.1.1.1: icmp_seq=0 ttl=254 time=10.000 ms

56 bytes from 8.1.1.1: icmp_seq=1 ttl=254 time=4.000 ms

56 bytes from 8.1.1.1: icmp_seq=2 ttl=254 time=4.000 ms

56 bytes from 8.1.1.1: icmp_seq=3 ttl=254 time=3.000 ms

56 bytes from 8.1.1.1: icmp_seq=4 ttl=254 time=3.000 ms

--- Ping statistics for 8.1.1.1 ---

5 packet(s) transmitted, 5 packet(s) received, 0.0% packet loss

round-trip min/avg/max/std-dev = 3.000/4.800/10.000/2.638 ms

The command output shows that Router C can reach subnet 8.1.1.0/24.

Configuration files

Router A

#

interface Loopback0

 ip address 1.1.1.1 255.255.255.255

#

interface GigabitEthernet1/0/1

 ip address 3.1.1.2 255.255.255.0

#

interface GigabitEthernet1/0/2

 ip address 8.1.1.1 255.255.255.0

#

bgp 65008

 router-id 1.1.1.1

 peer 3.1.1.1 as-number 65009

 #

 address-family ipv4 unicast

  network 8.1.1.0 255.255.255.0

  peer 3.1.1.1 enable

#

Router B

#

interface Loopback0

 ip address 2.2.2.2 255.255.255.255

#

interface GigabitEthernet1/0/1

 ip address 3.1.1.1 255.255.255.0

#

interface GigabitEthernet1/0/2

 ip address 9.1.1.1 255.255.255.0

#

bgp 65009

 router-id 2.2.2.2

 peer 3.1.1.2 as-number 65008

 peer 3.3.3.3 as-number 65009

 peer 3.3.3.3 connect-interface Loopback0

 #

 address-family ipv4 unicast

  network 3.1.1.0 24

  network 9.1.1.0 24

  peer 3.1.1.2 enable

  peer 3.3.3.3 enable

#

ospf 1

 area 0.0.0.0

  network 2.2.2.2 0.0.0.0

  network 9.1.1.0 0.0.0.255

#

Router C

#

interface Loopback0

 ip address 3.3.3.3 255.255.255.255

#

interface GigabitEthernet1/0/2

 ip address 9.1.1.2 255.255.255.0

#

bgp 65009

 router-id 3.3.3.3

 peer 2.2.2.2 as-number 65009

 peer 2.2.2.2 connect-interface Loopback0

 #

 address-family ipv4 unicast

  peer 2.2.2.2 enable

#

ospf 1

 area 0.0.0.0

  network 3.3.3.3 0.0.0.0

  network 9.1.1.0 0.0.0.255

#

Examples: Configuring BGP and IGP route redistribution

Network configuration

As shown in Figure 2, run EBGP between Router A and Router B, and run OSPF between Router B and Router C to allow communication only between subnets 9.1.2.0/24 and 8.1.1.0/24.

Figure 2 Network diagram

‌

Analysis

To enable Router B to communicate with Router C through loopback interfaces, enable OSPF in AS 65009.

To enable Router A to obtain the route to 9.1.2.0/24, configure BGP to redistribute routes from OSPF on Router B. To enable Router C to obtain the route to 8.1.1.0/24, configure OSPF to redistribute routes from BGP on Router B.

Software versions used

This configuration example was created and verified on R9141P16 of the MSR2630E-X1 device.

Restrictions and guidelines

·     Use loopback interfaces to establish IBGP connections to prevent route flapping caused by port state changes.

·     Loopback interfaces are virtual interfaces. Use the peer connect-interface command to specify the loopback interface as the source interface for establishing BGP connections.

·     The EBGP peers, Router A and Router B, are located in different ASs. Typically, their loopback interfaces are not reachable to each other, so the routers use directly connected interfaces to establish EBGP sessions.

Procedures

Configuring IP addresses for interfaces

# Configure IP addresses for Loopback 0, GigabitEthernet 1/0/1, and GigabitEthernet 1/0/2 on Router A.

<RouterA> system-view

[RouterA] interface loopback 0

[RouterA-LoopBack0] ip address 1.1.1.1 255.255.255.255

[RouterA-LoopBack0] quit

[RouterA] interface gigabitethernet 1/0/1

[RouterA-GigabitEthernet1/0/1] port link-mode route

[RouterA-GigabitEthernet1/0/1] ip address 8.1.1.1 255.255.255.0

[RouterA-GigabitEthernet1/0/1] quit

[RouterA] interface gigabitethernet 1/0/2

[RouterA-GigabitEthernet1/0/2] port link-mode route

[RouterA-GigabitEthernet1/0/2] ip address 3.1.1.2 255.255.255.0

[RouterA-GigabitEthernet1/0/2] quit

# Configure IP addresses for Loopback 0, GigabitEthernet 1/0/1, and GigabitEthernet 1/0/2 on Router B.

<RouterB> system-view

[RouterB] interface loopback 0

[RouterB-LoopBack0] ip address 2.2.2.2 255.255.255.255

[RouterB-LoopBack0] quit

[RouterB] interface gigabitethernet 1/0/1

[RouterB-GigabitEthernet1/0/1] port link-mode route

[RouterB-GigabitEthernet1/0/1] ip address 3.1.1.1 255.255.255.0

[RouterB-GigabitEthernet1/0/1] quit

[RouterB] interface gigabitethernet 1/0/2

[RouterB-GigabitEthernet1/0/2] port link-mode route

[RouterB-GigabitEthernet1/0/2] ip address 9.1.1.1 255.255.255.0

[RouterB-GigabitEthernet1/0/2] quit

# Configure IP addresses for Loopback 0, GigabitEthernet 1/0/1, and GigabitEthernet 1/0/2 on Router C.

<RouterC> system-view

[RouterC] interface loopback 0

[RouterC-LoopBack0] ip address 3.3.3.3 255.255.255.255

[RouterC-LoopBack0] quit

[RouterC] interface gigabitethernet 1/0/1

[RouterC-GigabitEthernet1/0/1] port link-mode route

[RouterC-GigabitEthernet1/0/1] ip address 9.1.2.1 255.255.255.0

[RouterC-GigabitEthernet1/0/1] quit

[RouterC] interface gigabitethernet 1/0/2

[RouterC-GigabitEthernet1/0/2] port link-mode route

[RouterC-GigabitEthernet1/0/2] ip address 9.1.1.2 255.255.255.0

[RouterC-GigabitEthernet1/0/2] quit

Configuring OSPF

# Configure OSPF on Router B.

[RouterB] ospf 1

[RouterB-ospf-1] area 0

[RouterB-ospf-1-area-0.0.0.0] network 2.2.2.2 0.0.0.0

[RouterB-ospf-1-area-0.0.0.0] network 9.1.1.0 0.0.0.255

[RouterB-ospf-1-area-0.0.0.0] quit

[RouterB-ospf-1] quit

# Configure OSPF on Router C.

[RouterC] ospf 1

[RouterC-ospf-1] area 0

[RouterC-ospf-1-area-0.0.0.0] network 9.1.1.0 0.0.0.255

[RouterC-ospf-1-area-0.0.0.0] network 9.1.2.0 0.0.0.255

[RouterC-ospf-1-area-0.0.0.0] quit

[RouterC-ospf-1] quit

Configuring EBGP

1.     Configure Router A.

# Set the router ID of Router A to 1.1.1.1 in BGP view.

[RouterA] bgp 65008

[RouterA-bgp] router-id 1.1.1.1

# Create EBGP peer 3.1.1.1 in BGP view and set the AS number of the peer to 65009.

[RouterA-bgp] peer 3.1.1.1 as-number 65009

# Create and enter BGP IPv4 unicast address family view, and then enable Router A to exchange IPv4 unicast routing information with peer 3.1.1.1.

[RouterA-bgp] address-family ipv4 unicast

[RouterA-bgp-ipv4] peer 3.1.1.1 enable

# Add route 8.1.1.0/24 to the BGP routing table, so that Router B can obtain route 8.1.1.0/24.

[RouterA-bgp-ipv4] network 8.1.1.0 24

[RouterA-bgp-ipv4] quit

[RouterA-bgp] quit

2.     Configure Router B.

# Set the router ID of Router B to 2.2.2.2 in BGP view.

[RouterB] bgp 65009

[RouterB-bgp] router-id 2.2.2.2

# Create EBGP peer 3.1.1.2 in BGP view and set the AS number of the peer to 65008.

[RouterB-bgp] peer 3.1.1.2 as-number 65008

# Create and enter BGP IPv4 unicast address family view, and then enable Router B to exchange IPv4 unicast routing information with peer 3.1.1.2.

[RouterB-bgp] address-family ipv4 unicast

[RouterB-bgp-ipv4] peer 3.1.1.2 enable

[RouterB-bgp-ipv4] quit

[RouterB-bgp] quit

Configuring BGP and IGP route redistribution:

# Enter BGP IPv4 unicast address family view, and then redistribute OSPF routes to BGP.

[RouterB] bgp 65009

[RouterB-bgp] address-family ipv4 unicast

[RouterB-bgp-ipv4] import-route ospf 1

[RouterB-bgp-ipv4] quit

[RouterB-bgp] quit

# Enter OSPF view, and then redistribute BGP routes to OSPF.

[RouterB] ospf 1

[RouterB-ospf-1] import-route bgp

[RouterB-ospf-1] quit

# Display the BGP routing table on Router A.

[RouterA] display bgp routing-table ipv4

 

 Total number of routes: 3

 

 BGP local router ID is 1.1.1.1

 Status codes: * - valid, > - best, d - dampened, h - history,

               s - suppressed, S - stale, i - internal, e - external

               Origin: i - IGP, e - EGP, ? – incomplete

 

     Network            NextHop         MED        LocPrf     PrefVal Path/Ogn

 

* >  8.1.1.0/24         8.1.1.1         0                     32768   i

* >e 9.1.2.0/24         3.1.1.1         1                     0       65009?

The command output shows that Router A has obtained route 9.1.2.0/24.

# Display the OSPF routing table on Router C.

[RouterC] display ospf routing

 

          OSPF Process 1 with Router ID 3.3.3.3

                   Routing Tables

 

 Routing for Network

 Destination        Cost     Type    NextHop         AdvRouter       Area

 9.1.1.0/24         1        Transit 9.1.1.2         3.3.3.3         0.0.0.0

 9.1.2.0/24         1        Stub    9.1.2.1         192.168.0.63    0.0.0.0

 2.2.2.2/32         1        Stub    9.1.1.1         2.2.2.2         0.0.0.0

 

 Routing for ASEs

 Destination        Cost     Type    Tag         NextHop         AdvRouter

 8.1.1.0/24         1        Type2   1           9.1.1.1         2.2.2.2

 

 Total Nets: 3

 Intra Area: 2  Inter Area: 0  ASE: 1  NSSA: 0

The command output shows that Router C has obtained route 8.1.1.0/24.

Verifying the configuration

# Verify that 8.1.1.1 can ping 9.1.2.1.

[RouterA] ping -a 8.1.1.1 9.1.2.1

Ping 9.1.2.1 (9.1.2.1) from 8.1.1.1: 56 data bytes, press CTRL_C to break

56 bytes from 9.1.2.1: icmp_seq=0 ttl=254 time=10.000 ms

56 bytes from 9.1.2.1: icmp_seq=1 ttl=254 time=12.000 ms

56 bytes from 9.1.2.1: icmp_seq=2 ttl=254 time=2.000 ms

56 bytes from 9.1.2.1: icmp_seq=3 ttl=254 time=7.000 ms

56 bytes from 9.1.2.1: icmp_seq=4 ttl=254 time=9.000 ms

 

--- Ping statistics for 9.1.2.1 ---

5 packet(s) transmitted, 5 packet(s) received, 0.0% packet loss

round-trip min/avg/max/std-dev = 2.000/8.000/12.000/3.406 ms

# Verify that 9.1.2.1 can ping 8.1.1.1.

[RouterC] ping -a 9.1.2.1 8.1.1.1

Ping 8.1.1.1 (8.1.1.1) from 9.1.2.1: 56 data bytes, press CTRL_C to break

56 bytes from 8.1.1.1: icmp_seq=0 ttl=254 time=9.000 ms

56 bytes from 8.1.1.1: icmp_seq=1 ttl=254 time=4.000 ms

56 bytes from 8.1.1.1: icmp_seq=2 ttl=254 time=3.000 ms

56 bytes from 8.1.1.1: icmp_seq=3 ttl=254 time=3.000 ms

56 bytes from 8.1.1.1: icmp_seq=4 ttl=254 time=3.000 ms

 

--- Ping statistics for 8.1.1.1 ---

5 packet(s) transmitted, 5 packet(s) received, 0.0% packet loss

round-trip min/avg/max/std-dev = 3.000/4.400/9.000/2.332 ms

# Verify that 8.1.2.1 cannot ping 9.1.2.1 or 9.1.3.1.

[RouterA] ping –a 8.1.2。1 9.1.2.1

Ping 9.1.2.1 (9.1.2.1) from 8.1.2.1: 56 data bytes, press CTRL_C to break

Request time out

Request time out

Request time out

Request time out

Request time out

 

--- Ping statistics for 9.1.2.1 ---

5 packet(s) transmitted, 0 packet(s) received, 100.0% packet loss

 

[RouterA] ping –a 8.1.2.1 9.1.3.1

Ping 9.1.3.1 (9.1.3.1) from 8.1.2.1: 56 data bytes, press CTRL_C to break

Request time out

Request time out

Request time out

Request time out

Request time out

 

--- Ping statistics for 9.1.3.1 ---

5 packet(s) transmitted, 0 packet(s) received, 100.0% packet loss

# Verify that 9.1.3.1 cannot ping 8.1.1.1 or 8.1.2.1.

[RouterC] ping –a 9.1.3.1 8.1.1.1

Ping 8.1.1.1 (8.1.1.1) from 9.1.3.1: 56 data bytes, press CTRL_C to break

Request time out

Request time out

Request time out

Request time out

Request time out

 

--- Ping statistics for 8.1.1.1 ---

5 packet(s) transmitted, 0 packet(s) received, 100.0% packet loss

 

[RouterC] ping –a 9.1.3.1 8.1.2.1

Ping 8.1.2.1 (8.1.2.1) from 9.1.3.1: 56 data bytes, press CTRL_C to break

Request time out

Request time out

Request time out

Request time out

Request time out

 

--- Ping statistics for 8.1.2.1 ---

5 packet(s) transmitted, 0 packet(s) received, 100.0% packet loss

Configuration files

Router A

#

interface Loopback0

 ip address 1.1.1.1 255.255.255.255

#

interface GigabitEthernet1/0/1

 ip address 8.1.1.1 255.255.255.0

#

interface GigabitEthernet1/0/2

 ip address 3.1.1.2 255.255.255.0

#

 bgp 65008

 router-id 1.1.1.1

 peer 3.1.1.1 as-number 65009

 #

 address-family ipv4 unicast

  network 8.1.1.0 255.255.255.0

  peer 3.1.1.1 enable

#

Router B

#

interface Loopback0

 ip address 2.2.2.2 255.255.255.255

#

interface GigabitEthernet1/0/1

 ip address 3.1.1.1 255.255.255.0

#

interface GigabitEthernet1/0/2

 ip address 9.1.1.1 255.255.255.0

#

bgp 65009

 router-id 2.2.2.2

 peer 3.1.1.2 as-number 65008

 #

 address-family ipv4 unicast

  import-route ospf 1

  peer 3.1.1.2 enable

#

ospf 1

 import-route bgp

 area 0.0.0.0

  network 2.2.2.2 0.0.0.0

  network 9.1.1.0 0.0.0.255

#

Router C

#

interface Loopback0

 ip address 3.3.3.3 255.255.255.255

#

interface GigabitEthernet1/0/1

 ip address 9.1.2.1 255.255.255.0

#

interface GigabitEthernet1/0/2

 ip address 9.1.1.2 255.255.255.0

#

ospf 1

 area 0.0.0.0

  network 9.1.1.0 0.0.0.255

  network 9.1.2.0 0.0.0.255

#

Related documentation

·     Layer 3—IP Routing Configuration Guide in H3C MSR1000[2600][3600] Routers Configuration Guides(V9)

·     Layer 3—IP Routing Command Reference in H3C MSR1000[2600][3600] Routers Command References(V9)