HP 5500 Ei 5500 Si Switch Series Configuration Guide
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89
Step Command Remarks
1. Enter system view.
system-view N/A
2. Enter OSPF view. ospf
[ process-id | router-id router-id |
vpn-instance vpn-instance-name ] * N/A
3.
Configure the router as a
stub router. stub-router By default, the router is not a stub
router in any OSPF process.
Configuring OSPF authentication
You can configure OSPF packet authentication to ensure the security of packet exchanges.
After authentication is configured, OSPF only receives packets that pass...](http://img.usermanuals.tech/thumb/36/58909/w64_hp-5500-ei-5500-si-switch-series-configuration-guide-777.png "Page 778
89
Step Command Remarks
1. Enter system view.
system-view N/A
2. Enter OSPF view. ospf
[ process-id | router-id router-id |
vpn-instance vpn-instance-name ] * N/A
3.
Configure the router as a
stub router. stub-router By default, the router is not a stub
router in any OSPF process.
Configuring OSPF authentication
You can configure OSPF packet authentication to ensure the security of packet exchanges.
After authentication is configured, OSPF only receives packets that pass...")
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90
Step Command Remarks
2. Enter interface view. interface
interface-type
interface-number N/A
3. Enable the interface to add its
MTU into DD packets. ospf mtu-enable Optional.
Not enabled by default.
Configuring the maximum number of external LSAs in LSDB
Step Command Remarks
1. Enter system view.
system-view N/A
2. Enter OSPF view. ospf
[ process-id | router-id router-id |
vpn-instance vpn-instance-name ] * N/A
3.
Specify the maximum number
of external LSAs in...](http://img.usermanuals.tech/thumb/36/58909/w64_hp-5500-ei-5500-si-switch-series-configuration-guide-778.png "Page 779
90
Step Command Remarks
2. Enter interface view. interface
interface-type
interface-number N/A
3. Enable the interface to add its
MTU into DD packets. ospf mtu-enable Optional.
Not enabled by default.
Configuring the maximum number of external LSAs in LSDB
Step Command Remarks
1. Enter system view.
system-view N/A
2. Enter OSPF view. ospf
[ process-id | router-id router-id |
vpn-instance vpn-instance-name ] * N/A
3.
Specify the maximum number
of external LSAs in...")
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92
Step Command Remarks
1. Enter system view.
system-view N/A
2. Enter OSPF view. ospf
[ process-id | router-id router-id |
vpn-instance vpn-instance-name ] *
N/A
3. Enable the advertisement and
reception of opaque LSAs. opaque-capability enable Optional.
Disabled by default.
Configuring OSPF to give priority to receiving and processing
hello packets
To ensure OSPF runs properly, a router receives an
d processes hello packets and other protocol packets
at the same time. When...](http://img.usermanuals.tech/thumb/36/58909/w64_hp-5500-ei-5500-si-switch-series-configuration-guide-780.png "Page 781
92
Step Command Remarks
1. Enter system view.
system-view N/A
2. Enter OSPF view. ospf
[ process-id | router-id router-id |
vpn-instance vpn-instance-name ] *
N/A
3. Enable the advertisement and
reception of opaque LSAs. opaque-capability enable Optional.
Disabled by default.
Configuring OSPF to give priority to receiving and processing
hello packets
To ensure OSPF runs properly, a router receives an
d processes hello packets and other protocol packets
at the same time. When...")
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96
Configuring the OSPF GR Helper
You can configure the IETF standard or non-IETF standard OSPF GR Helper.
Configuring the IETF standard OSPF GR Helper
Step Command Remarks
1. Enter system view.
system-view N/A
2. Enable OSPF and enter its
view. ospf
[ process-id | router-id
router-id | vpn-instance
vpn-instance-name ] * N/A
3.
Enable opaque LSA reception
and advertisement. opaque
-capability enable Not enabled by default.
4. Configure the neighbors for
which the router...](http://img.usermanuals.tech/thumb/36/58909/w64_hp-5500-ei-5500-si-switch-series-configuration-guide-784.png "Page 785
96
Configuring the OSPF GR Helper
You can configure the IETF standard or non-IETF standard OSPF GR Helper.
Configuring the IETF standard OSPF GR Helper
Step Command Remarks
1. Enter system view.
system-view N/A
2. Enable OSPF and enter its
view. ospf
[ process-id | router-id
router-id | vpn-instance
vpn-instance-name ] * N/A
3.
Enable opaque LSA reception
and advertisement. opaque
-capability enable Not enabled by default.
4. Configure the neighbors for
which the router...")
92 Step Command Remarks 1. Enter system view. system-view N/A 2. Enter OSPF view. ospf [ process-id | router-id router-id | vpn-instance vpn-instance-name ] * N/A 3. Enable the advertisement and reception of opaque LSAs. opaque-capability enable Optional. Disabled by default. Configuring OSPF to give priority to receiving and processing hello packets To ensure OSPF runs properly, a router receives an d processes hello packets and other protocol packets at the same time. When the router has established neighbor relationships with multiple routers, and the routing table size is big, the router must receive and process large numbers of packets. In this case, you can configure OSPF to give priority to receiving and processing hello packets to ensure stable neighbor relationships. To configure OSPF to give priority to receiving and processing hello packets: Step Command Remarks 1. Enter system view. system-view N/A 2. Configure OSPF to give priority to receiving and processing hello packets. ospf packet-process prioritized-treatment Not configured by default. Configuring the LSU transmit rate Sending large numbers of LSU packets affects rout er performance and consumes too much network bandwidth. You can configure the router to send LSU packets at a proper interval and limit the maximum number of LSU packets sent out of an OSPF interface each time. To configure the LSU transmit rate: Step Command Remarks 1. Enter system view. system-view N/A 2. Enter OSPF view. ospf [ process-id | router-id router-id | vpn-instance vpn-instance-name ] * N/A 3. Configure the LSU transmit rate. transmit-pacing interval interval count count Optional. By default, an OSPF interface sends up to three LSU packets every 20 milliseconds.
93 Setting the DSCP value for OSPF packets An IPv4 packet header contains an 8-bit TOS field. As defined in RFC 2474, the first six bits set the Differentiated Services Code Point (DSCP) value and the last two bits are reserved. Network devices use the DSCP value as a reference to determ ine the packet priority for transmission. You can set the DSCP value for OSPF packets. To set the DSCP value for OSPF packets: Step Command Remarks 1. Enter system view. system-view N/A 2. Enable an OSPF process and enter OSPF view. ospf [ process-id | router-id router-id | vpn-instance vpn-instance-name ] * By default, OSPF is not enabled. 3. Set the DSCP value for OSPF packets. dscp dscp-value Optional. By default, the DSCP value in OSPF packets is 48. Enabling OSPF ISPF When a network topology is changed, Incremental Shortest Path First (ISPF) allows the system to recomputes only the affected part of the shortest path tree (SPT), instead of the entire SPT. To enable OSPF ISPF: Step Command Remarks 1. Enter system view. system-view N/A 2. Enter OSPF view. ospf [ process-id | router-id router-id | vpn-instance vpn-instance-name ] * N/A 3. Enable OSPF ISPF. ispf enable Optional. Disabled by default. Configuring OSPF FRR When a link fails, the packets on the link are discarded, and a routing loop may occur until OSPF completes routing convergence based on the new network topology. You can enable OSPF fast reroute (FRR) to solve this problem. Figure 37 Network diagram for OSPF FRR
94 In Figure 37 , af ter you enable FRR on Router B, OSPF au tomatically calculates or designates a backup next hop when a link failure is detected. Packets are directed to the backup next hop. At the same time, OSPF calculates the shortest path based on the ne w network topology, and forwards packets over the path after routing convergence. You can either configure OSPF FRR to calculate a backup next hop automatically, or to designate a backup next hop by using a routing policy. Configuration prerequisites Before you configure OSPF FRR, complete the following tasks: • Configure network layer addresses for interfaces. • Enable OSPF. Configuration guideliens • Do not use FRR and BFD at the same time. Otherwise, FRR may fail to take effect. • Do not use the fast-reroute auto command together with the commands vlink-peer . Configuring OSPF FRR to automatically calculate a backup next hop Step Command Remarks 1. Enter system view. system-view N/A 2. Configure the source address of echo packets. bfd echo-source-ip ip-address Not configured by default. 3. Enter OSPF view. ospf [ process-id | router-id router-id | vpn-instance vpn-instance-name ] * N/A 4. Enable OSPF FRR to automatically calculate a backup next hop. fast-reroute auto [ abr-only ] Not configured by default. If abr-only is specified, the route to the ABR is selected as the backup path. Configuring OSPF FRR to designate a backup next hop with a routing policy Before configuring this task, you need to use the apply fast-reroute backup-interface command to specify a backup next hop in the routing policy to be referenced. For more information about the apply fast-reroute backup-interface command and routing policy configuration, see Configuring routing poli cies . To configure OSPF FRR: Step Command Remarks 1. Enter system view. system-view N/A 2. Configure the source address of echo packets. bfd echo-source-ip ip-address Not configured by default. 3. Enter OSPF view. ospf [ process-id | router-id router-id | vpn-instance vpn-instance-name ] * N/A 4. Enable OSPF FRR to designate a backup next hop by using a routing policy. fast-reroute route-policy route-policy-name Not configured by default.
95 Configuring OSPF Graceful Restart OSPF GR involves the following: • IETF standard GR —Uses Opaque LSAs to implement GR. • Non IETF standard GR—Uses link local signaling (LLS) to advertise GR capability and uses out of band synchronization to synchronize the LSDB. A device can act as a GR Restarter and GR Helper at the same time. Configuring the OSPF GR Restarter You can configure the IETF standard or non IETF standard OSPF GR Restarter. Configuring the IETF standard OSPF GR Restarter Step Command Remarks 1. Enter system view. system-view N/A 2. Enable OSPF and enter its view. ospf [ process-id | router-id router-id | vpn-instance vpn-instance-name ] * N/A 3. Enable opaque LSA advertisement capability. opaque-capability enable Disabled by default. 4. Enable the IETF standard Graceful Restart capability. graceful-restart ietf Disabled by default. 5. Configure the Graceful Restart interval. graceful-restart interval timer Optional. 120 seconds by default. Configuring the non-IETF standard OSPF GR Restarter Step Command Remarks 1. Enter system view. system-view N/A 2. Enable OSPF and enter its view. ospf [ process-id | router-id router-id | vpn-instance vpn-instance-name ] * N/A 3. Enable the link-local signaling capability. enable link-local-signaling Disabled by default. 4. Enable the out-of-band re -synchronization capability. enable out-of-band-resynchronization Disabled by default. 5. Enable non-IETF standard Graceful Restart capability for OSPF. graceful-restart [ nonstandard ] Disabled by default. 6. Configure Graceful Restart interval for OSPF. graceful-restart interval timer Optional. 120 seconds by default.
96
Configuring the OSPF GR Helper
You can configure the IETF standard or non-IETF standard OSPF GR Helper.
Configuring the IETF standard OSPF GR Helper
Step Command Remarks
1. Enter system view.
system-view N/A
2. Enable OSPF and enter its
view. ospf
[ process-id | router-id
router-id | vpn-instance
vpn-instance-name ] * N/A
3.
Enable opaque LSA reception
and advertisement. opaque
-capability enable Not enabled by default.
4. Configure the neighbors for
which the router can serve as
a GR Helper. graceful-restart help
{ acl-number
| prefix prefix-list } Optional.
The router can serve as a GR
Helper for any OSPF neighbor by
default.
Configuring the non IETF standard OSPF GR Helper
Step Command Remarks
1. Enter system view.
system-view N/A
2.
Enable OSPF and enter its
view. ospf
[ process-id | router-id
router-id | vpn-instance
vpn-instance-name ] * N/A
3.
Enable the link-local signaling
capability. enable link-local-signaling
Disabled by default.
4. Enable the out-of-band
re -synchronization capability. enable
out-of-band-resynchronization
Disabled by default.
5.
Configure the neighbors for
which the router can serve as
a GR Helper. graceful-restart help
{ acl-number
| prefix prefix-list } Optional.
The router can serve as a GR
Helper for any OSPF neighbor by
default.
Triggering OSPF Graceful Restart
Performing a Master/Slave switchover, or performing the following configuration on an OSPF router, will
trigger OSPF Graceful Restart.
To trigger OSPF Graceful Restart:
Task Command Remarks
Trigger OSPF Graceful Restart. reset ospf
[ process -id ] process
graceful-restart Available in user view
97
Configuring BFD for OSPF
OSPF supports the following BFD detection methods:
• Control packet bidirectional detection, which requir es BFD configuration to be made on both OSPF
routers on the link.
• Echo packet single-hop detection, which requires BF D configuration to be made on one OSPF router
on the link.
Configuring control packet bidirectional detection
Both ends of a BFD session must be on the same network segment and in the same area. One network
segment can only belong to one area.
To enable BFD control packet bidirectional detection on an OSPF interface:
Step Command Description
1. Enter system view.
system-view N/A
2. Enter interface view. interface
interface-type
interface-number N/A
3.
Enable BFD control packet bidirectional
detection on the interface. ospf bfd enable Not enabled by
default.
Configuring echo packet single-hop detection
Step Command Description
1.
Enter system view.
system-view N/A
2. Configure the source address of echo
packets. bfd echo-source-ip
ip-address Not configured by
default.
3.
Enter interface view. interface
interface-type
interface-number N/A
4.
Enable BFD echo packet single-hop
detection on the interface. ospf bfd enable echo Not enabled by
default.
Displaying and maintaining OSPF
Task Command Remarks
Display OSPF brief information.
display ospf [ process-id
] brief [ | { begin |
exclude | include } regular-expression ]
Available in any
view
Display OSPF statistics.
display ospf [
process-id ] cumulative [ | { begin |
exclude | include } regular-expression ]
Available in any
view
98
Task Command Remarks
Display Link State Database
information. display ospf
[ process-id ] lsdb [ brief | [ { ase |
router | network | summary | asbr | nssa |
opaque-link | opaque-area | opaque-as }
[ link-state-id ] ] [ originate-router
advertising-router-id | self-originate ] ] [ | { begin
| exclude | include } regular-expression ]
Available in any
view
Display OSPF neighbor
information.
display ospf [
process-id ] peer [ verbose ]
[ interface-type interface-number ] [ neighbor-id ]
[ | { begin | exclude | include }
regular-expression ]
Available in any
view
Display neighbor statistics of OSPF
areas. display ospf
[ process-id ] peer statistics [ | { begin
| exclude | include } regular-expression ] Available in any
view
Display next hop information.
display ospf
[ process-id ] nexthop [ | { begin |
exclude | include } regular-expression ]
Available in any
view
Display routing table information.
display ospf
[ process-id ] routing [ interface
interface-type interface-number ] [ nexthop
nexthop-address ] [ | { begin | exclude | include }
regular-expression ] Available in any
view
Display virtual link information.
display ospf
[ process-id ] vlink [ | { begin |
exclude | include } regular-expression ] Available in any
view
Display OSPF request queue
information.
display ospf [
process-id ] request-queue
[ interface-type interface-number ] [ neighbor-id ]
[ | { begin | exclude | include }
regular-expression ] Available in any
view
Display OSPF retransmission
queue information.
display ospf [ process-id
] retrans-queue
[ interface-type interface-number ] [ neighbor-id ]
[ | { begin | exclude | include }
regular-expression ] Available in any
view
Display OSPF ABR and ASBR
information.
display ospf
[ process-id ] abr-asbr [ | { begin |
exclude | include } regular-expression ] Available in any
view
Display OSPF interface
information.
display ospf [ process-id
] interface [ all |
interface-type interface-number ] [ | { begin |
exclude | include } regular-expression ] Available in any
view
Display OSPF error information.
display ospf
[ process-id ] error [ | { begin |
exclude | include } regular-expression ] Available in any
view
Display OSPF ASBR
summarization information. display ospf [
process-id ] asbr-summary
[ ip-address { mask | mask-length } ] [ | { begin |
exclude | include } regular-expression ] Available in any
view
Display the global router ID. display router id
[ | { begin | exclude | include }
regular-expression ] Available in any
view
Reset OSPF counters. reset ospf
[ process-id ] counters [ neighbor
[ interface-type interface-number ] [ router-id ] ] Available in user
view
Reset an OSPF process.
reset ospf [ process-id ] process [ graceful-restart ] Available in user
view
Re-enable OSPF route
redistribution. reset
ospf [ process-id ] redistribution
Available in user
view
99 OSPF configuration examples These examples only cover commands for OSPF configuration. Configuring OSPF basic functions Network requirements As shown in Figure 38, all s witches run OSPF. The AS is split into three areas, where Switch A and Switch B act as ABRs to forward routing information between areas. After configuration, all switches can learn routes to every network segment in the AS. Figure 38 Network diagram Configuration procedure 1. Configure IP addresses for inte rfaces. (Details not shown.) 2. Configure OSPF basic functions: # Configure Switch A. system-view [SwitchA] ospf [SwitchA-ospf-1] area 0 [SwitchA-ospf-1-area-0.0.0.0] network 10.1.1.0 0.0.0.255 [SwitchA-ospf-1-area-0.0.0.0] quit [SwitchA-ospf-1] area 1 [SwitchA-ospf-1-area-0.0.0.1] network 10.2.1.0 0.0.0.255 [SwitchA-ospf-1-area-0.0.0.1] quit [SwitchA-ospf-1] quit # Configure Switch B. system-view [SwitchB] ospf [SwitchB-ospf-1] area 0 [SwitchB-ospf-1-area-0.0.0.0] network 10.1.1.0 0.0.0.255 [SwitchB-ospf-1-area-0.0.0.0] quit [SwitchB-ospf-1] area 2 [SwitchB-ospf-1-area-0.0.0.2] network 10.3.1.0 0.0.0.255 [SwitchB-ospf-1-area-0.0.0.2] quit [SwitchB-ospf-1] quit Area 0 Area 1 Area 2 Switch C Vlan-int100 10.1.1.2/24 Vlan-int100 10.1.1.1/24 Vlan-int300 10.4.1.1/24 Vlan-int200 10.2.1.2/24 Switch B Vlan-int200 10.3.1.1/24 Vlan-int200 10.3.1.2/24 Switch A Vlan-int20010.2.1.1/24 Vlan-int30010.5.1.1/24 Switch D
100
# Configure Switch C
system-view
[SwitchC] ospf
[SwitchC-ospf-1] area 1
[SwitchC-ospf-1-area-0.0.0.1] network 10.2.1.0 0.0.0.255
[SwitchC-ospf-1-area-0.0.0.1] network 10.4.1.0 0.0.0.255
[SwitchC-ospf-1-area-0.0.0.1] quit
[SwitchC-ospf-1] quit
# Configure Switch D
system-view
[SwitchD] ospf
[SwitchD-ospf-1] area 2
[SwitchD-ospf-1-area-0.0.0.2] network 10.3.1.0 0.0.0.255
[SwitchD-ospf-1-area-0.0.0.2] network 10.5.1.0 0.0.0.255
[SwitchD-ospf-1-area-0.0.0.2] quit
[SwitchD-ospf-1] quit
3. Verify the configuration:
# Display information about neighbors on Switch A.
[SwitchA] display ospf peer verbose
OSPF Process 1 with Router ID 10.2.1.1
Neighbors
Area 0.0.0.0 interface 10.1.1.1(Vlan-interface100)s neighbors
Router ID: 10.3.1.1 Address: 10.1.1.2 GR State: Normal \
State: Full Mode: Nbr is Master Priority: 1
DR: 10.1.1.1 BDR: 10.1.1.2 MTU: 0
Dead timer due in 37 sec
Neighbor is up for 06:03:59
Authentication Sequence: [ 0 ]
Neighbor state change count: 5
Neighbors
Area 0.0.0.1 interface 10.2.1.1(Vlan-interface200)s neighbors
Router ID: 10.4.1.1 Address: 10.2.1.2 GR State: Normal \
State: Full Mode: Nbr is Master Priority: 1
DR: 10.2.1.1 BDR: 10.2.1.2 MTU: 0
Dead timer due in 32 sec
Neighbor is up for 06:03:12
Authentication Sequence: [ 0 ]
Neighbor state change count: 5
# Display OSPF routing information on Switch A.
[SwitchA] display ospf routing
OSPF Process 1 with Router ID 10.2.1.1
Routing Tables
101
Routing for Network
Destination Cost Type NextHop AdvRouter Are\
a
10.2.1.0/24 10 Transit 10.2.1.1 10.2.1.1 0.0\
.0.1
10.3.1.0/24 4 Inter 10.1.1.2 10.3.1.1 0.0\
.0.0
10.4.1.0/24 13 Stub 10.2.1.2 10.4.1.1 0.0\
.0.1
10.5.1.0/24 14 Inter 10.1.1.2 10.3.1.1 0.0\
.0.0
10.1.1.0/24 2 Transit 10.1.1.1 10.2.1.1 0.0\
.0.0
Total Nets: 5
Intra Area: 3 Inter Area: 2 ASE: 0 NSSA: 0
# Display the Link State Database on Switch A.
[SwitchA] display ospf lsdb
OSPF Process 1 with Router ID 10.2.1.1
Link State Database
Area: 0.0.0.0
Type LinkState ID AdvRouter Age Len Sequence Metr\
ic
Router 10.2.1.1 10.2.1.1 1069 36 80000012 \
0
Router 10.3.1.1 10.3.1.1 780 36 80000011 \
0
Network 10.1.1.1 10.2.1.1 1069 32 80000010 \
0
Sum-Net 10.5.1.0 10.3.1.1 780 28 80000003 1\
2
Sum-Net 10.2.1.0 10.2.1.1 1069 28 8000000F 1\
0
Sum-Net 10.3.1.0 10.3.1.1 780 28 80000014 \
2
Sum-Net 10.4.1.0 10.2.1.1 769 28 8000000F 1\
3
Area: 0.0.0.1
Type LinkState ID AdvRouter Age Len Sequence Metr\
ic
Router 10.2.1.1 10.2.1.1 769 36 80000012 \
0
Router 10.4.1.1 10.4.1.1 1663 48 80000012 \
0
Network 10.2.1.1 10.2.1.1 769 32 80000010 \
0
Sum-Net 10.5.1.0 10.2.1.1 769 28 80000003 1\
4
Sum-Net 10.3.1.0 10.2.1.1 1069 28 8000000F \
4
Sum-Net 10.1.1.0 10.2.1.1 1069 28 8000000F \
2
Sum-Asbr 10.3.1.1 10.2.1.1 1069 28 8000000F \
2
# Display OSPF routing information on Switch D.
[SwitchD] display ospf routing
OSPF Process 1 with Router ID 10.5.1.1
Routing Tables
Routing for Network
Destination Cost Type NextHop AdvRouter Are\
a
10.2.1.0/24 22 Inter 10.3.1.1 10.3.1.1 0.0\
.0.2
10.3.1.0/24 10 Transit 10.3.1.2 10.3.1.1 0.0\
.0.2
10.4.1.0/24 25 Inter 10.3.1.1 10.3.1.1 0.0\
.0.2
10.5.1.0/24 10 Stub 10.5.1.1 10.5.1.1 0.0\
.0.2
10.1.1.0/24 12 Inter 10.3.1.1 10.3.1.1 0.0\
.0.2