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HP 5500 Ei 5500 Si Switch Series Configuration Guide

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[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 10 
[SwitchB-Vlan-interface10] isis ipv6 enable 1 
[SwitchB-Vlan-interface10] quit 
[SwitchB] interface vlan-interface 13 
[SwitchB-Vlan-interface13] isis ipv6 enable 1 
[SwitchB-Vlan-interface13] 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 11 
[SwitchC-Vlan-interface11] isis ipv6 enable 1 
[SwitchC-Vlan-interface11] quit 
[SwitchC] interface vlan-interface 13 
[SwitchC-Vlan-interface13] isis ipv6 enable 1 
[SwitchC-Vlan-interface13] quit 
3. Configure BFD functions:  
# Enable BFD on Switch A and configure BFD parameters. 
[SwitchA] bfd session init-mode active 
[SwitchA] interface vlan-interface 10 
[SwitchA-Vlan-interface10] isis ipv6 bfd enable 
[SwitchA-Vlan-interface10] bfd min-transmit-interval 500 
[SwitchA-Vlan-interface10] bfd min-receive-interval 500 
[SwitchA-Vlan-interface10] bfd detect-multiplier 7 
[SwitchA-Vlan-interface10] return 
# Enable BFD on Switch B and configure BFD parameters. 
[SwitchB] bfd session init-mode active 
[SwitchB] interface vlan-interface 10 
[SwitchB-Vlan-interface10] isis ipv6 bfd enable 
[SwitchB-Vlan-interface10] bfd min-transmit-interval 500 
[SwitchB-Vlan-interface10] bfd min-receive-interval 500 
[SwitchB-Vlan-interface10] bfd detect-multiplier 6 
4. Verify configuration: 
The following operations are made on Switch A.  Operations for Switch B are similar and are not 
shown here.  
# Display the BFD information of Switch A.  
 display bfd session 
Total Session Num: 1            Init Mode: Active 
 
 IPv6 Session Working Under Ctrl Mode:
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    							 323 
 
     Local Discr: 1441                Remote Discr: 1450 
       Source IP: FE80::20F:FF:FE00:1202 (link-local address of VLAN-interface 10 on 
Switch A) 
    Destination IP: FE80::20F:FF:FE00:1200 (link-local address of VLAN-interface 10 on 
Switch B) 
   Session State: Up                     Interface: Vlan10 
       Hold Time:    / 
# Display route 2001:4::0/64 on Switch A, and you can see that Switch A and Switch B 
communicate through the Layer-2 switch.  
 display ipv6 routing-table 2001:4::0 64 verbose 
Routing Table : 
Summary Count : 2 
 
 Destination  : 2001:4::0                               PrefixLength : 6\
4 
 NextHop      : 2001::2                                 Preference   : 1\
5 
 IpPrecedence :                                         QosLcId      : 
 RelayNextHop : ::                                      Tag          : 0\
H 
 Neighbor     : ::                                      ProcessID    : 0\
 
 Interface    : Vlan-interface10                        Protocol     : I\
SISv6 
 State        : Active Adv                              Cost         : 2\
0 
 Tunnel ID    : 0x0                                     Label        : N\
ULL 
 Age          : 4538sec 
 
 Destination  : 2001:4::0                               PrefixLength : 6\
4 
 NextHop      : 2001:2::2                               Preference   : 1\
5 
 IpPrecedence :                                         QosLcId      : 
 RelayNextHop : ::                                      Tag          : 0\
H 
 Neighbor     : ::                                      ProcessID    : 0\
 
 Interface    : Vlan-interface11                        Protocol     : I\
SISv6 
 State        : Invalid Adv                             Cost         : 3\
0 
 Tunnel ID    : 0x0                                     Label        : N\
ULL 
 Age          : 4515sec 
# Enable BFD debugging on Switch A.  
 debugging bfd scm 
 debugging bfd event 
 debugging isis event bfd 
 terminal debugging 
# When the link between Switch B and the Layer-2 switch fails, BFD can quickly detect the failure.  
#Aug  8 14:54:05:362 2009 SwitchA IFNET/4/INTERFACE UPDOWN: 
 Trap 1.3.6.1.6.3.1.1.5.3: Interface 983041 is Down, ifAdminSt\
atus is 
1, ifOperStatus is 2 
#Aug  8 14:54:05:363 2009 SwitchA ISIS/4/ADJ_CHANGE:TrapID(1.3.6.1.2.1.\
138.0.17< 
isisAdjacencyChange>), ISIS Level-2 Adjencency IN Circuit-983041 State \
Change. 
#Aug  8 14:54:05:364 2009 SwitchA ISIS/4/ADJ_CHANGE:TrapID(1.3.6.1.2.1.\
138.0.17< 
isisAdjacencyChange>), ISIS Level-1 Adjencency IN Circuit-983041 State \
Change. 
%Aug  8 14:54:05:365 2009 SwitchA IFNET/4/LINK UPDOWN: vlan10: link status is DOWN
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    							 324 
%Aug  8 14:54:05:366 2009 SwitchA IFNET/4/UPDOWN: Line protocol on the interface Vlan10 
is DOWN 
%Aug  8 14:54:05:367 2009 SwitchA ISIS/4/ADJLOG:ISIS-1-ADJCHANGE: Adjace\
ncy To 
0000.0000.0002 (vlan10) DOWN, Level-2 Circuit Down. 
%Aug  8 14:54:05:367 2009 SwitchA ISIS/4/ADJLOG:ISIS-1-ADJCHANGE: Adjace\
ncy To 
0000.0000.0002 (vlan10) DOWN, Level-2 Adjacency clear. 
%Aug  8 14:54:05:368 2009 SwitchA ISIS/4/ADJLOG:ISIS-1-ADJCHANGE: Adjace\
ncy To 
0000.0000.0002 (vlan10) DOWN, Level-1 Circuit Down. 
%Aug  8 14:54:05:369 2009 SwitchA ISIS/4/ADJLOG:ISIS-1-ADJCHANGE: Adjace\
ncy To 
0000.0000.0002 (vlan10) DOWN, Level-1 Adjacency clear. 
*Aug  8 14:54:05:369 2009 SwitchA ISIS/6/ISIS: ISIS-1-BFD: Recieve BFD s\
ession down . 
Type 0. DstIPAddr: FE80::20F:FF:FE00:1200 , SrcIPAddr: FE80::20F:FF:FE00\
:1202 
*Aug  8 14:54:05:370 2009 SwitchA ISIS/6/ISIS: ISIS-1-BFD: Success to send msg. Msg 
type 1 delete session. IfPhyIndex: 5 , DstIPAddr: FE80::20F:FF:FE00:1200\
 , SrcIPAddr: 
FE80::20F:FF:FE00:1202. NeighborType:Level-1. 
# Display the BFD information of Switch A. You  can see that Switch A has removed its neighbor 
relationship with Switch B and therefore no information is output.  
 display bfd session 
# Display route 2001:4::0/64 on Switch A, and you can see that Switch A and Switch B 
communicate through Switch C.  
 display ipv6 routing-table 2001:4::0 64 verbose 
Routing Table : 
Summary Count : 1 
 
 Destination  : 2001:4::0                               PrefixLength : 6\
4 
 NextHop      : 2001:2::2                               Preference   : 1\
5 
 IpPrecedence :                                         QosLcId      : 
 RelayNextHop : ::                                      Tag          : 0\
H 
 Neighbor     : ::                                      ProcessID    : 0\
 
 Interface    : Vlan-interface11                        Protocol     : I\
SISv6 
 State        : Invalid Adv                             Cost         : 3\
0 
 Tunnel ID    : 0x0                                     Label        : N\
ULL 
 Age          : 4610sec
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325 
 
Configuring IPv6 BGP 
This chapter describes only configuration for IPv6 BGP. For BGP related information, see Configuring 
BG
P . The 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 BGP.  
IPv6 BGP overview 
BGP-4 was designed to carry only IPv4 routing information, so other network layer protocols such as IPv6 
are not supported.  
To support multiple network layer protocols, IETF extended BGP-4 by introducing Multiprotocol BGP 
(MP-BGP), which is defined in RFC 2858  (multiprotocol extensions for BGP-4). 
For brevity purposes, MP-BGP for IPv6 is called IPv6 BGP. 
IPv6 BGP puts IPv6 network layer information into  the attributes of Network Layer Reachability 
Information (NLRI) and NEXT_HOP. 
The NLRI attribute of IPv6 BGP involves the following: 
•   MP_REACH_NLRI —Multiprotocol Reachable NLRI, for advertising reachable route and next hop 
information. 
•   MP_UNREACH_NLRI —Multiprotocol Unreachable NLRI, for withdrawal of unreachable routes. 
The NEXT_HOP attribute of IPv6 BGP is identified by an IPv6 unicast address or IPv6 local link address.  
IPv6 BGP has the same messaging and routing mechanisms as BGP. 
IPv6 BGP configuration task list 
 
Task Remarks 
Configuring IPv6 BGP basic 
f
Specifying an IPv6 BGP peer  Required
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326 
 Task Remarks 
Injecting a local IPv6 route 
Optional 
Configuring a preferred value for routes from a 
peer or peer group Optional 
Specifying the source interface for establishing TCP 
connections  
Optional 
Allowing the establishment of an indirect EBGP 
connection Optional 
Configuring a description for an IPv6 peer or peer 
group Optional 
Disabling session establishment to an IPv6 peer or 
peer group Optional 
Logging IPv6 peer or peer group state changes 
Optional 
Controlling route distribution 
and reception Configuring IPv6 BGP route redistribution 
Optional 
Configuring IPv6 BGP route summarization Optional 
Advertising a default route to an IPv6 peer or peer 
group Optional 
Configuring outbound route filtering 
Optional 
Configuring inbound route filtering Optional 
Configuring IPv6 BGP and IGP route 
synchronization Optional 
Configuring route dampening 
Optional 
Configuring IPv6 BGP route 
attributes Configuring IPv6 BGP preference and default 
LOCAL_PREF and NEXT_HOP attributes 
Optional 
Configuring the MED attribute 
Optional 
Configuring the AS_PATH attribute Optional 
Tuning and optimizing IPv6 
BGP networks Configuring IPv6 BGP timers 
Optional 
Configuring IPv6 BGP soft reset Optional 
Enabling the IPv6 BGP ORF capability Optional 
Enabling 4-byte AS number suppression Optional 
Setting the DSCP value for IPv6 BGP packets Optional 
Configuring the maximum number of 
load-balanced routes Optional 
Enabling MD5 authentication for TCP connections 
Optional 
Applying an IPsec policy to an IPv6 BGP peer or 
peer group Optional 
Configuring a large-scale IPv6 
BGP network Configuring IPv6 BGP peer group 
Optional Configuring IPv6 BGP community Optional 
Configuring an IPv6 BGP route reflector Optional
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327 
 Task Remarks 
Configuring BFD for IPv6 BGP 
Optional 
 
Configuring IPv6 BGP basic functions 
Configuration prerequisites 
Before you configure IPv6 BGP basic functions, complete the following tasks: 
•  Specify IP addresses for interfaces. 
•   Enable IPv6. 
Configuration guidelines 
Create a peer group before configuring basic  functions for it. For more information, see Configuring 
IP
v6 BGP peer group . 
Specifying an IPv6 BGP peer  
Step Command Remarks 
1.  Enter system view. 
system-view  N/A 
2.  Enter BGP view. 
bgp as-number   N/A 
3.  Specify a router ID. 
router-id router-id   Optional. 
Required if no IP addresses are 
configured for any interfaces. 
4.
  Enter IPv6 address family 
view.   ipv6-family 
N/A 
5.  Specify an IPv6 peer.  peer 
ipv6-address  as-number 
as-number   N/A
 
 
Injecting a local IPv6 route  
Step Command Remarks 
1.  Enter system view. 
system-view  N/A 
2.  Enter BGP view. 
bgp as-number   N/A 
3.  Enter IPv6 address family 
view.   ipv6-family 
N/A 
4.  Inject a local route into the 
IPv6 BGP routing table.  network
 ipv6-address prefix-length  
[ short-cut  | route-policy  
route-policy-name  ]
  Not added by default.
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328 
 
Configuring a preferred value for routes from a peer or peer 
group 
If you both reference a routing policy and use the command  peer { ipv6-group-name  | ipv6-address  } 
preferred-value  value  to set a preferred value for routes from a peer, the routing policy sets the specific 
preferred value for routes matching it. If the preferred value in the routing policy is zero, the routes use the 
value set with the  peer { ipv6-group-name  | ipv6-address }  preferred-value  value command. For how to 
use a routing policy to set a preferred value, see the command  peer { group-name  | ipv4-address  | 
ipv6-address  } route-policy  route-policy-name  { import | export  } in this chapter, and the command 
apply preferred-value  preferred-value in Layer 3—IP Routing Command Reference . 
To configure a preferred value for routes from a peer or peer group: 
 
Step Command Remarks 
1.   Enter system view. 
system-view  N/A 
2.  Enter BGP view. 
bgp as-number   N/A 
3.  Enter IPv6 address family 
view.   ipv6-family 
N/A 
4.  Configure a preferred value 
for routes received from an 
IPv6 peer or peer group.  peer {
 ipv6-group-name  | 
ipv6-address  } preferred-value 
value   By default, the preferred value is 0.
 
 
Specifying the source interface for establishing TCP 
connections  
IPv6 BGP uses TCP as the transport layer protocol. By default, IPv6 BGP uses the output interface of the 
optimal route to a peer or peer group as the source 
interface for establishing TCP connections to the peer 
or peer group.  
If an IPv6 BGP router has multiple links to a peer , and the source interface fails, IPv6 BGP has to 
reestablish TCP connections, causing network oscillation. To enhance stability of IPv6 BGP connections, 
HP recommends using a loopback interface as the source interface. 
To establish a BGP connection, specify on the local ro uter the source interface for establishing the TCP 
connection to the peer on the peering BGP router. Otherwise, the local BGP router may fail to establish 
TCP connection to the peer when using the outbound interface of the best route as the source interface. 
To specify the source interface for establishing  TCP connections to a BGP peer or peer group: 
 
Step Command Remarks 
1.  Enter system view. 
system-view  N/A 
2.  Enter BGP view. 
bgp as-number   N/A 
3.  Enter IPv6 address family 
view.  ipv6-family 
N/A
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329 
 Ste
p Command Remarks 
4.
  Specify the source interface 
for establishing TCP 
connections to an IPv6 BGP 
peer or peer group.  peer {
 ipv6-group-name  | 
ipv6-address } connect-interface  
interface-type  interface-number
 By default, IPv6 BGP uses the 
outbound interface of the best 
route to the IPv6 BGP peer or peer 
group as the source interface for 
establishing a TCP connection.
 
 
Allowing the establishment of an indirect EBGP connection 
Direct links must be available between  EBGP peers. If not, you can use the peer ebgp-max-hop 
command to establish a multi-hop TCP connection in  between. However, do not use this command for 
direct EBGP connections with loopback interfaces. 
To allow the establishment of a non-direct EBGP connection: 
 
Step Command Remarks 
1.   Enter system view. 
system-view N/A 
2.  Enter BGP view. 
bgp as-number   N/A 
3.  Enter IPv6 address family view. 
ipv6-family N/A 
4.  Allow the establishment of EBGP 
connection to an indirectly connected peer 
or peer group.  peer { ipv6-group-name 
| 
ipv6-address } ebgp-max-hop  
[ hop-count  ]  Not configured by 
default. 
 
Configuring a description for an IPv6 peer or peer group  
Step Command Remarks 
1.
  Enter system view. 
system-view  N/A 
2.  Enter BGP view. 
bgp as-number   N/A 
3.  Enter IPv6 address family 
view.  ipv6-family 
N/A 
4.  Configure a description for an 
IPv6 peer or peer group.  peer {
 ipv6-group-name  | ipv6-address  } 
description  description-text   Optional. 
Not configured by default. 
The peer group to be 
configured with a 
description must have been 
created. 
 
Disabling session establishment to an IPv6 peer or peer group  
Step Command Remarks 
1.
  Enter system view. 
system-view N/A 
2.  Enter BGP view. 
bgp as-number   N/A
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330 
 Ste
p Command Remarks 
3.
  Enter IPv6 address family view. 
ipv6-family N/A 
4.  Disable session establishment to an 
IPv6 peer or peer group.  peer { ipv6-group-name 
| 
ipv6-address }  ignore  Optional. 
Not disabled by default. 
 
Logging IPv6 peer or peer group state changes  
Step Command Remarks 
1.
  Enter system view. 
system-view  N/A 
2.  Enter BGP view. 
bgp as-number   N/A 
3.  Enable logging of peer 
changes globally.  log-peer-change  Optional. 
Enabled by default. 
For information about the 
log-peer-change
 command, see 
Layer 3—IP Routing Command 
Reference . 
4.  Enter IPv6 address family 
view.  ipv6-family 
N/A 
5.  Enable the state change 
logging for an IPv6 peer or 
peer group.  peer {
 ipv6-group-name  | 
ipv6-address  } log-change  Optional. 
Enabled by default. 
 
Controlling route distribution and reception 
This task includes routing information filtering,
 routing policy application, and route dampening. 
Configuration prerequisites 
Before you configure route distribution and reception control, complete the following tasks: 
•  Enable IPv6. 
•   Configure IPv6 BGP basic functions. 
Configuring IPv6 BGP route redistribution 
To configure IPv6 BGP route redistribution:   
Step Command Remarks 
1.  Enter system view. 
system-view N/A 
2.  Enter BGP view. 
bgp as-number   N/A 
3.  Enter IPv6 address family view.  
ipv6-family  N/A
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331 
 Ste
p Command Remarks 
4.
  Enable default route redistribution into 
the IPv6 BGP routing table.  default-route imported Optional. 
Not enabled by default. 
If the default-route imported
 
command is not configured, 
using the import-route  command 
cannot redistribute any IGP 
default route. 
5.   Enable route redistribution from 
another routing protocol.  import-route 
protocol 
[  process-id  [ med med-value  
|  route-policy 
route-policy-name  ] * ]
  Not enabled by default.
 
 
Configuring IPv6 BGP route summarization 
To reduce the routing table size on medium and large BGP networks, configure route summarization on 
BGP routers. BGP supports only manual summarization of IPv6 routes. 
To configure IPv6 BGP route summarization: 
 
Step Command Remarks 
1.  Enter system view. 
system-view  N/A 
2.  Enter BGP view. 
bgp as-number   N/A 
3.  Enter IPv6 address 
family view.   ipv6-family 
N/A 
4.  Configure manual 
route summarization.  aggregate 
ipv6-address prefix-length  [ as-set | 
attribute-policy  route-policy-name  | 
detail-suppressed  | origin-policy route-policy-name  
|  suppress-policy  route-policy-name  ] *  Not configured by 
default. 
 
Advertising a default route to an IPv6 peer or peer group  
Step Command Remarks 
1.
  Enter system view. 
system-view  N/A 
2.  Enter BGP view. 
bgp as-number   N/A 
3.  Enter IPv6 address family 
view.   ipv6-family 
N/A
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