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HP 5500 Ei 5500 Si Switch Series Configuration Guide

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    							 312 
Incorrect routing information 
Symptom 
OSPFv3 cannot find routes to other areas. 
Analysis 
The backbone area must maintain connectivity to all other areas. If a router connects to more than one 
area, at least one area must be connected to the backbone. The backbone cannot be configured as a 
stub area. 
In a stub area, routers cannot receive external routes , and interfaces connected to the stub area must be 
associated with the stub area. 
Solution 
1.  Use the  display ospfv3 peer  command to display OSPFv3 neighbors. 
2. Use the  display ospfv3 interface  command to display OSPFv3 interface information. 
3. Use the  display ospfv3 lsdb  command to display LSDB information to check integrity. 
4. Display information about area configuration using the  display current-configuration 
configuration command. If more than two areas are config ured, at least one area is connected to 
the backbone. 
5.  In a stub area, all routers are configured with the  stub command. 
6. If a virtual link is configured, use the  display ospf vlink command to check the neighbor state.
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Configuring IPv6 IS-IS 
This chapter describes how to configure IPv6 IS-IS, which supports all IPv4 IS-IS features except that it 
advertises IPv6 routing information instead. For information about IS-IS, see  Configuring IS-IS.  
T

he term router in this chapter refers to both routers and Layer 3 switches. 
Hardware compatibility 
The HP 5500 SI Switch Series does not support IPv6 IS-IS.  
Introduction to IPv6 IS-IS 
The IS-IS routing protocol (Interme diate System-to-Intermediate System intra-domain routing information 
exchange protocol) supports multiple network protocol s, including IPv6. The international engineer task 
force (IETF) defines two type-length-values (TLVs) and a new network layer protocol identifier (NLPID) to 
enable IS-IS to support IPv6.  
TLV is a variable-length field in the link state PDU or link state packet (LSP). The TLVs include the following: 
•   IPv6 Reachability —Defines the prefix, metric of routing information to indicate network reachability, 
and has a type value of 236 (0xEC). 
•   IPv6 Interface Address —Same as the IP Interface Address TLV in IPv4 ISIS, except the 32-bit IPv4 
address is translated to the 128-bit IPv6 address. 
The NLPID is an eight-bit field that identifies whic h network layer protocol is supported. For IPv6, the 
NLPID is 142 (0x8E), which must be carried in hello pac kets sent by a router that supports IPv6 IS-IS. 
Configuring IPv6 IS-IS basic functions 
You can implement IPv6 inter-networking through configuring IPv6 IS-IS in IPv6 network environment. 
Before the configuration, complete the following tasks: 
•  Enable IPv6 globally. 
•   Configure IP addresses for interfaces, and ensure all neighboring nodes are reachable. 
•   Enable IS-IS. 
To configure the basic functions of IPv6 IS-IS: 
 
Step Command Remarks 
1.   Enter system view. 
system-view  N/A 
2.  Enable an IS-IS process and 
enter IS-IS view.   isis
 [ process-id  ] 
  Not enabled by default. 
3.
  Configure the network entity 
title for the IS-IS process.  network-entity 
net  Not configured by default. 
4.  Enable IPv6 for the IS-IS 
process.  ipv6 enable 
Disabled by default.
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    							 314 
Step Command Remarks 
5.  Return to system view. 
quit  N/A 
6.  Enter interface view.  interface
 interface-type 
interface-number   N/A 
7.
  Enable IPv6 for an IS-IS 
process on the interface.  isis ipv6 enable
 [ process-id ] 
  Disabled by default. 
 
Configuring IPv6 IS-IS routing information control 
Complete the IPv6 IS-IS basic function configuration before configuring this task. 
For information about ACL, see 
ACL and QoS Configuration Guide . 
For information about routing policy and IPv6 prefix list, see  Configuring routing policies. 
T

o configure IPv6 IS-IS routing information control: 
 
Step Command Remarks 
1.   Enter system view. 
system-view  N/A 
2.  Enter IS-IS view.  
isis [ process-id  ]
  N/A 
3.
  Define the priority for IPv6 
IS-IS routes.   ipv6 preference 
{ route-policy 
route-policy-name  |  preference  } *
  Optional. 
15 by default. 
4.
  Configure an IPv6 IS-IS 
summary route.  ipv6 summary 
ipv6-prefix prefix-length 
[ avoid-feedback |  generate_null0_route  | 
[  level-1  | level-1-2  | level-2  ] | tag  tag ] *
  Optional. 
Not configured by 
default. 
5.
  Generate an IPv6 IS-IS 
default route.   ipv6 default-route-advertise
 [ [ level-1 | 
level-1-2  | level-2  ] | route-policy 
route-policy-name  ] *
  Optional. 
By default, no IPv6 
default route is defined.
 
6.  Configure IPv6 IS-IS to filter 
incoming routes.  ipv6 filter-policy
 { acl6-number | ipv6-prefix 
ipv6-prefix-name |  route-policy 
route-policy-name  } import
  Optional. 
By default, no filtering 
policy is defined. 
7.
  Configure IPv6 IS-IS to 
redistribute routes from 
another routing protocol.  ipv6 import-route 
protocol [ process-id  ] 
[  allow-ibgp  ] [ cost cost  | [ level-1  | level-1-2 
|  level-2  ] | route-policy  route-policy-name  | 
tag  tag ] *
  Optional. 
Not configured by 
default. 
8.
  Configure the maximum 
number of redistributed Level 
1/Level 2 IPv6 routes.  ipv6 import-route limit 
number  Optional. 
The default varies with 
devices. 
9.
  Configure the filtering of 
outgoing redistributed 
routes.   ipv6 filter-policy
 { acl6-number | ipv6-prefix 
ipv6-prefix-name |  route-policy 
route-policy-name  } export [  protocol 
[ process-id  ] ]
  Optional. 
Not configured by 
default. 
10.
 Enable route leaking.  ipv6 import-route isisv6 level-2 into level-1
 
[ filter-policy  { acl6-number  | ipv6-prefix 
ipv6-prefix-name  | route-policy 
route-policy-name } |  tag tag ] * 
  Optional. 
Not enabled by default.
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    							 315 
Step Command Remarks 
11. Specify the maximum 
number of equal-cost load 
balanced routes.  ipv6 maximum load-balancing 
number  Optional. 
8 by default. 
 
 
NOTE: 
The ipv6 filter-policy export  command is usually combined with the  ipv6 import-route command. If no 
protocol is specified for the  ipv6 filter-policy export  command, routes redistributed from all routing 
protocols are filtered before advertisement. If a protocol is specified, only routes redistributed from the 
routing protocol are filtered for advertisement.  
 
Configuring BFD for IPv6 IS-IS 
Bidirectional forwarding detection (BFD) provides a mechanism to quickly detect the connectivity of links 
between IPv6 IS-IS neighbors, thus to improve the convergence speed of IPv6 IS-IS. For more information 
about BFD, see  High Availability Configuration Guide . 
To  c o n fig u re  B F D  fo r  I P v 6  IS - IS :  
 
Step Command Remarks 
1.   Enter system view. 
system-view  N/A 
2.
  Enable an IS-IS process and 
enter IS-IS view.   isis
 [ process-id  ]
  N/A 
3.
  Configure the network entity 
title for the IS-IS process.  network-entity 
net  Not configured by default. 
4.  Enable IPv6 for the IS-IS 
process.  ipv6 enable 
Disabled by default.
 
5.  Return to system view. 
quit  N/A 
6.  Enter interface view.  interface
 interface-type 
interface-number   N/A 
7.
  Enable IPv6 for an IS-IS 
process on the interface.  isis ipv6 enable
 [ process-id ] 
  Disabled by default. 
8.
  Enable BFD on the interface. 
isis ipv6 bfd enable  Not enabled by default. 
 
Displaying and maintaining IPv6 IS-IS 
 
Task Command Remarks 
Display brief IPv6 IS-IS information. display isis brief
 [ | { begin  | exclude  | 
include  } regular-expression ]  Available in any view
 
Display the status of the debug 
switches.  display isis debug-switches 
{ process-id  | 
vpn-instance  vpn-instance-name  } [  | { begin  
|  exclude  | include  } regular-expression ]  Available in any view
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Task Command Remarks 
Display IS-IS enabled interface 
information. display
 isis  interface [ statistics  | 
[ interface-type interface-number  ] 
[  verbose  ] ] [ process-id  | vpn-instance 
vpn-instance-name  ] [ | { begin  | exclude | 
include  } regular-expression ]  Available in any view
 
Display LSDB information.  display isis lsdb
 [ [ l1 | l2 | level-1  | level-2  ] 
| [ [ lsp-id  lsp-id  | lsp-name  lspname | 
local  ] | verbose ] * ] * [ process-id  | 
vpn-instance  vpn-instance-name  ] [ | { begin  
|  exclude  | include  } regular-expression ]  Available in any view
 
Display IS-IS mesh group 
information.  display isis mesh-group 
[ process-id | 
vpn-instance  vpn-instance-name  ] [ | { begin  
|  exclude  | include  } regular-expression ]  Available in any view
 
Display the mapping table 
between the host name and system 
ID.  display isis name-table 
[ process-id | 
vpn-instance  vpn-instance-name  ] [ | { begin  
|  exclude  | include  } regular-expression ]  Available in any view
 
Display IS-IS neighbor information.  display
 isis  peer  [ statistics | verbose  ] 
[ process-id  | vpn-instance  
vpn-instance-name  ] [ | { begin  | exclude | 
include  } regular-expression ]  Available in any view
 
Display IPv6 IS-IS routing 
information.  display isis route ipv6
 [ [ level-1 | level-2 ] | 
verbose  ] * [ process-id  | vpn-instance 
vpn-instance-name  ] [ | { begin  | exclude | 
include  } regular-expression ]  Available in any view
 
Display SPF log information.  display isis spf-log 
[ process-id | 
vpn-instance  vpn-instance-name  ] [ | { begin  
|  exclude  | include  } regular-expression ]  Available in any view
 
Display the statistics of the IS-IS 
process.  display isis statistics
 [ level-1 | level-1-2  | 
level-2  ] [ process-id  |  vpn-instance  
vpn-instance-name  ] [ | { begin  | exclude | 
include  } regular-expression ]  Available in any view
 
Clear all IS-IS data structure 
information.  reset isis all 
[ process-id  |  vpn-instance 
vpn-instance-name  ]  Available in user view
 
Clear the IS-IS data information of 
a neighbor.  reset isis peer
 system-id [  process-id  |  vpn 
vpn-instance-name  ]   Available in user view
 
 
IPv6 IS-IS configuration examples 
IPv6 IS-IS basic configuration example 
Network requirements 
As shown in Figure 113, S witch A, Switch B, Switch C, and Switch D reside in the same autonomous 
system, and all are enabled with IPv6. 
Switch A and Switch B are Level-1 switches, Switch D is  a Level-2 switch, and Switch C is a Level-1-2 switch. 
Switch A, Switch B, and Switch C are in area 10, and Switch D is in area 20.
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Figure 113 Network diagram 
 
 
Configuration procedure 
1. Configure IPv6 addresses for inte rfaces. (Details not shown.) 
2. Configure IPv6 IS-IS: 
# Configure Switch A. 
 system-view 
[SwitchA] ipv6 
[SwitchA] isis 1 
[SwitchA-isis-1] is-level level-1 
[SwitchA-isis-1] network-entity 10.0000.0000.0001.00 
[SwitchA-isis-1] ipv6 enable 
[SwitchA-isis-1] quit 
[SwitchA] interface vlan-interface 100 
[SwitchA-Vlan-interface100] isis ipv6 enable 1 
[SwitchA-Vlan-interface100] quit 
# Configure Switch B. 
 system-view 
[SwitchB] ipv6 
[SwitchB] isis 1  
[SwitchB-isis-1] is-level level-1 
[SwitchB-isis-1] network-entity 10.0000.0000.0002.00 
[SwitchB-isis-1] ipv6 enable 
[SwitchB-isis-1] quit 
[SwitchB] interface vlan-interface 200 
[SwitchB-Vlan-interface200] isis ipv6 enable 1 
[SwitchB-Vlan-interface200] quit 
# Configure Switch C. 
 system-view 
[SwitchC] ipv6 
[SwitchC] isis 1 
[SwitchC-isis-1] network-entity 10.0000.0000.0003.00 
[SwitchC-isis-1] ipv6 enable 
[SwitchC-isis-1] quit 
[SwitchC] interface vlan-interface 100
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[SwitchC-Vlan-interface100] isis ipv6 enable 1 
[SwitchC-Vlan-interface100] quit 
[SwitchC] interface vlan-interface 200 
[SwitchC-Vlan-interface200] isis ipv6 enable 1 
[SwitchC-Vlan-interface200] quit 
[SwitchC] interface vlan-interface 300 
[SwitchC-Vlan-interface300] isis ipv6 enable 1 
[SwitchC-Vlan-interface300] quit 
# Configure Switch D. 
 system-view 
[SwitchD] ipv6 
[SwitchD] isis 1  
[SwitchD-isis-1] is-level level-2 
[SwitchD-isis-1] network-entity 20.0000.0000.0004.00 
[SwitchD-isis-1] ipv6 enable 
[SwitchD-isis-1] quit 
[SwitchD] interface vlan-interface 300 
[SwitchD-Vlan-interface300] isis ipv6 enable 1 
[SwitchD-Vlan-interface300] quit 
[SwitchD] interface vlan-interface 301 
[SwitchD-Vlan-interface301] isis ipv6 enable 1 
[SwitchD-Vlan-interface301] quit 
3. Verify the configuration: 
# Display the IPv6 IS-IS routing table of Switch A.  
[SwitchA] display isis route ipv6 
 
                         Route information for ISIS(1) 
                         ----------------------------- 
 
                     ISIS(1) IPv6 Level-1 Forwarding Table 
                     ------------------------------------- 
 Destination: ::                                      PrefixLen: 0 
 Flag       : R/-/-                                   Cost     : 10 
 Next Hop   : FE80::200:FF:FE0F:4                     Interface: Vlan100\
 
 
 Destination: 2001:1::                                PrefixLen: 64 
 Flag       : D/L/-                                   Cost     : 10 
 Next Hop   : Direct                                  Interface: Vlan100\
 
 
 Destination: 2001:2::                                PrefixLen: 64 
 Flag       : R/-/-                                   Cost     : 20 
 Next Hop   : FE80::200:FF:FE0F:4                     Interface: Vlan100\
 
 
 Destination: 2001:3::                                PrefixLen: 64 
 Flag       : R/-/-                                   Cost     : 20 
 Next Hop   : FE80::200:FF:FE0F:4                     Interface: Vlan100\
 
 
      Flags: D-Direct, R-Added to RM, L-Advertised in LSPs, U-Up/Down Bi\
t Set
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# Display the IPv6 IS-IS routing table of Switch B.  
[SwitchB] display isis route ipv6 
 
                         Route information for ISIS(1) 
                         ----------------------------- 
 
                     ISIS(1) IPv6 Level-1 Forwarding Table 
                     ------------------------------------- 
 Destination: ::                                      PrefixLen: 0 
 Flag       : R/-/-                                   Cost     : 10 
 Next Hop   : FE80::200:FF:FE0F:4                     Interface: Vlan200\
 
 
 Destination: 2001:1::                                PrefixLen: 64 
 Flag       : D/L/-                                   Cost     : 10 
 Next Hop   : FE80::200:FF:FE0F:4                     Interface: Vlan200\
 
 
 Destination: 2001:2::                                PrefixLen: 64 
 Flag       : R/-/-                                   Cost     : 20 
 Next Hop   : Direct                                  Interface: Vlan200\
 
 
 Destination: 2001:3::                                PrefixLen: 64 
 Flag       : R/-/-                                   Cost     : 20 
 Next Hop   : FE80::200:FF:FE0F:4                     Interface: Vlan200\
 
 
      Flags: D-Direct, R-Added to RM, L-Advertised in LSPs, U-Up/Down Bi\
t Set 
# Display the IPv6 IS-IS routing table of Switch C.  
[SwitchC] display isis route ipv6 
 
                         Route information for ISIS(1) 
                         ----------------------------- 
 
                     ISIS(1) IPv6 Level-1 Forwarding Table 
                     ------------------------------------- 
 Destination: 2001:1::                                PrefixLen: 64 
 Flag       : D/L/-                                   Cost     : 10 
 Next Hop   : Direct                                  Interface: Vlan100\
 
 
 Destination: 2001:2::                                PrefixLen: 64 
 Flag       : D/L/-                                   Cost     : 10 
 Next Hop   : Direct                                  Interface: Vlan200\
 
 
 Destination: 2001:3::                                PrefixLen: 64 
 Flag       : D/L/-                                   Cost     : 10 
 Next Hop   : Direct                                  Interface: Vlan300\
 
 
      Flags: D-Direct, R-Added to RM, L-Advertised in LSPs, U-Up/Down Bi\
t Set
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                     ISIS(1) IPv6 Level-2 Forwarding Table 
                     ------------------------------------- 
 Destination: 2001:1::                                PrefixLen: 64 
 Flag       : D/L/-                                   Cost     : 10 
 Next Hop   : Direct                                  Interface: Vlan100\
 
 
 Destination: 2001:2::                                PrefixLen: 64 
 Flag       : D/L/-                                   Cost     : 10 
 Next Hop   : Direct                                  Interface: Vlan200\
 
 
 Destination: 2001:3::                                PrefixLen: 64 
 Flag       : D/L/-                                   Cost     : 10 
 Next Hop   : Direct                                  Interface: Vlan300\
 
 
 Destination: 2001:4::1                               PrefixLen: 128 
 Flag       : R/-/-                                   Cost     : 10 
 Next Hop   : FE80::20F:E2FF:FE3E:FA3D                Interface: Vlan300\
 
 
      Flags: D-Direct, R-Added to RM, L-Advertised in LSPs, U-Up/Down Bi\
t Set 
# Display the IPv6 IS-IS routing table of Switch D.  
[SwitchD] display isis route ipv6 
 
                         Route information for ISIS(1) 
                         ----------------------------- 
 
                     ISIS(1) IPv6 Level-2 Forwarding Table 
                     ------------------------------------- 
 Destination: 2001:1::                                PrefixLen: 64 
 Flag       : R/-/-                                   Cost     : 20 
 Next Hop   : FE80::200:FF:FE0F:4                     Interface: Vlan300\
 
 
Destination: 2001:2::                                PrefixLen: 64 
 Flag       : R/-/-                                   Cost     : 20 
 Next Hop   : FE80::200:FF:FE0F:4                     Interface: Vlan300\
 
 
 Destination: 2001:3::                                PrefixLen: 64 
 Flag       : D/L/-                                   Cost     : 10 
 Next Hop   : Direct                                  Interface: Vlan300\
 
 
 Destination: 2001:4::1                               PrefixLen: 128 
 Flag       : D/L/-                                   Cost     : 0 
 Next Hop   : Direct                                  Interface: Loop1 
 
      Flags: D-Direct, R-Added to RM, L-Advertised in LSPs, U-Up/Down Bi\
t Set
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BFD for IPv6 IS-IS configuration example 
Network requirements 
As shown in Figure 114, c onfigure IPv6 IS-IS on Switch A, Switch B, and Switch C and configure BFD over 
the link Switch AL2 SwitchSwitch B.  
After the link between Switch B and the Layer-2 switch fails, BFD can quickly detect the failure and notify 
IPv6 IS-IS of the failure. Then Switch A and Switch B communicate through Switch C.  
Figure 114  Network diagram 
 
Device  Interface  IPv6 address  Device  Interface  IPv6 address 
Switch A  Vlan-int10  2001::1/64 Switch B Vlan-int10 2001::2/64 
 Vlan-int11 2001:2::1/64  Vlan-int13 2001:3::2/64 
Switch C Vlan-int11 2001:2::2/64    
 Vlan-int13 2001:3::1/64     
Configuration procedure 
1. Configure IP addresses for inte rfaces. (Details not shown.) 
2. Configure IPv6 IS-IS: 
# Configure Switch A. 
 system-view 
[SwitchA] ipv6 
[SwitchA] isis 1 
[SwitchA-isis-1] is-level level-1 
[SwitchA-isis-1] network-entity 10.0000.0000.0001.00 
[SwitchA-isis-1] ipv6 enable 
[SwitchA-isis-1] quit 
[SwitchA] interface vlan-interface 10 
[SwitchA-Vlan-interface10] isis ipv6 enable 1 
[SwitchA-Vlan-interface10] quit 
[SwitchA] interface vlan-interface 11 
[SwitchA-Vlan-interface11] isis ipv6 enable 1 
[SwitchA-Vlan-interface11] quit 
# Configure Switch B. 
 system-view 
[SwitchB] ipv6 
[SwitchB] isis 1
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