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documented in RFC 2373. You must specify the prefix-length parameter as a decimal value. A slash
mark (/) must follow the ipv6-prefix parameter and precede the prefix-length parameter.
The longer-prefixes keyword allows you to display statistics for routes that match a specified or longer
IPv6 prefix. For example, if you specify 2001:db8::/16 longer-prefixes , then all routes with the prefix
2001:db88:: or that have a longer prefix (such as 2001:db8::/32) are displayed.
The as-path-filter number parameter specifies an AS path filter to display. Specify a filter number.
The neighbor ipv6-address parameter displays statistics for routes learned from the specified neighbor
only. You also can display route flap statistics for routes learned from a neighbor by entering the
following command: show ipv6 /jointfilesconvert/1441084/bgp neighbor flap-statistics .
The regular-expression regular-expression parameter is a regular expression. The regular
expressions are the same ones supported for BGP4 AS-path filters.
You can also display route flap dampening statistics for a specified IPv6 neighbor. For more
information, refer to Displaying route flap dampening statistics for a BGP4+ neighbor on page 567.
show ipv6 /jointfilesconvert/1441084/bgp flap-statistics output descriptionsTABLE 111
This field... Displays...
Total number of
flapping routes
The total number of routes in the device’s BGP4+ route table that have changed state and
thus have been marked as flapping routes.
Status code Indicates the dampening status of the route, which can be one of the following:
• > - This is the best route among those in the BGP4+ route table to the route’s
destination.
• d - This route is currently dampened, and thus unusable.
• h - The route has a history of flapping and is unreachable now.
• * - The route has a history of flapping but is currently usable.
Network The destination network of the route.
From The IPv6 address of the advertising peer.
Flaps The number of flaps (state changes) the route has experienced.
Since The amount of time (in hh:mm:ss) since the first flap of this route.
Reuse The amount of time (in hh:mm:ss) after which the path is again available.
Path The AS path of the route.
You also can display all the dampened routes by using the show ipv6 /jointfilesconvert/1441084/bgp dampened-paths
command. For more information, refer to Displaying dampened BGP4+ paths on page 551.
Displaying BGP4+ neighbor information
You can display the following information about a device’s BGP4+ neighbors:
Configuration information and statistics:
Displaying BGP4+ neighbor information
FastIron Ethernet Switch Layer 3 Routing Configuration Guide 557
53-1003087-04
- FastIron Ethernet Switch 1
- Layer 3 Routing 1
- Contents 3
- 53-1003087-04 10
- Document conventions 15
- Notes, cautions, and warnings 16
- Brocade resources 17
- Document feedback 18
- About This Document 19
- Basic IP configuration 22
- IP configuration overview 23
- Layer 3 switches 24
- Layer 2 switches 24
- ARP cache 26
- Static ARP table 26
- IP route table 27
- IP forwarding cache 27
- IP route exchange protocols 28
- IP multicast protocols 29
- ACLs and IP access policies 29
- Configuring IP addresses 38
- Deleting an IP address 41
- Configuration example 42
- Configuring DNS resolver 43
- Defining DNS server addresses 44
- Defining a domain list 44
- Configuring packet parameters 45
- Changing the MTU 46
- Changing the router ID 48
- Telnet packets 50
- TACACS/TACACS+ packets 51
- RADIUS packets 51
- TFTP packets 51
- Syslog packets 52
- SNTP packets 52
- SSH packets 52
- ARP parameter configuration 53
- Rate limiting ARP packets 54
- Changing the ARP aging period 55
- Enabling proxy ARP 55
- Creating static ARP entries 56
- ARP Packet Validation 58
- Ingress ARP packet priority 59
- Disabling ICMP messages 62
- Static routes configuration 64
- Static IP route parameters 65
- Configuring a static IP route 66
- Naming a static IP route 68
- Configuring IP load sharing 74
- Path cost 75
- How IP load sharing works 76
- IRDP parameters 77
- Enabling IRDP globally 78
- Disabling RARP 80
- Creating static RARP entries 80
- DHCP Server 85
- DHCP Option 82 support 86
- DHCP Server options 86
- Default DHCP server settings 88
- DHCP server CLI commands 88
- Removing DHCP leases 90
- Enabling DHCP Server 90
- Creating an address pool 91
- Configuring the TFTP server 94
- DHCP Log messages 104
- Defining a DNS entry 106
- Changing the TTL threshold 107
- DHCP Assist configuration 108
- How DHCP Assist works 109
- IP Configuration 110
- Configuring DHCP Assist 111
- IPv4 GRE tunnel overview 112
- Creating a tunnel interface 119
- Clearing GRE statistics 131
- Displaying ARP entries 136
- Displaying the IP route table 140
- Clearing IP routes 143
- Syntax: show ip traffic 148
- Disabling IP checksum check 151
- Layer 3 Routing Protocols 153
- Adding a static IP route 154
- Static route recursive lookup 156
- Adding a static ARP entry 157
- Layer 3 configuration notes 158
- Switches 163
- IPv6 addressing overview 165
- IPv6 address types 166
- IPv6 CLI command support 168
- Enabling IPv6 routing 172
- FE48:4672:/64 173
- Configuring SNMP V3 over IPv6 177
- Secure Shell, SCP, and IPv6 177
- IPv6 Telnet 177
- IPv6 traceroute 178
- Defining an IPv6 DNS entry 179
- Pinging an IPv6 address 179
- Contact: 180
- Neighbor redirect messages 185
- IPv6 MTU 190
- Clearing the IPv6 cache 194
- Displaying local IPv6 routers 201
- Syntax: show ipv6 traffic 205
- DHCP relay agent for IPv6 209
- RIP feature support 219
- RIP Overview 219
- RIP parameters and defaults 220
- Configuring RIP parameters 222
- Configuring metric parameters 223
- Configuring redistribution 224
- Enabling redistribution 225
- Setting RIP timers 229
- Displaying RIP Information 230
- Metric-offset, Outbound 0 231
- RIPng feature support 233
- RIPng Overview 233
- Configuring RIPng 234
- Configuring RIPng timers 235
- Displaying RIPng information 239
- OSPFv2 feature support 243
- OSPF overview 244
- OSPF point-to-point links 246
- OSPF graceful restart 252
- Configuring OSPF 254
- OSPF parameters 255
- Enable OSPF on the device 256
- Assign OSPF areas 256
- Assign a totally stubby area 257
- Configuring an NSSA 258
- Modify interface defaults 262
- Assign virtual links 266
- Define redistribution filters 271
- Enable route redistribution 273
- OSPF non-stop routing 279
- LSA delayed acknowledging 280
- LSA syncing and packing 280
- Standby module operations 281
- Enabling and disabling NSR 282
- Disabling configuration 282
- OSPF distribute list 283
- Examples 284
- Modify SPF timers 286
- Modify OSPF traps generated 288
- Modify exit overflow interval 289
- Displaying OSPF information 295
- Displaying OSPF trap status 311
- Clearing OSPF neighbors 314
- Clearing OSPF information 316
- OSPFv3 feature support 317
- OSPFv3 overview 318
- Configuring OSPFv3 319
- Assigning OSPFv3 areas 320
- Specifying a network type 325
- Configuring virtual links 326
- Filtering OSPFv3 routes 332
- IPsec for OSPFv3 340
- Configuring IPsec for OSPFv3 340
- General considerations 341
- Configuring IPsec for an area 344
- Clearing IPsec statistics 346
- Displaying OSPFv3 information 348
- IPsec examples 372
- Showing IPsec policy 373
- Showing IPsec statistics 374
- Changing a key 378
- OSPFv3 clear commands 379
- Clearing OSPFv3 data in a VRF 380
- Clearing OSPFv3 neighbors 380
- Clearing OSPFv3 counters 381
- Configuring BGP4 (IPv4) 383
- BGP4 overview 385
- BGP4 message types 388
- Grouping of RIB-out peers 389
- Implementation of BGP4 390
- BGP4 restart 390
- BGP4 neighbor local AS 392
- Disabling BGP4 394
- BGP4 parameters 395
- Memory considerations 397
- Enabling BGP4 on the device 398
- Changing the device ID 398
- Setting the local AS number 399
- Adding a loopback interface 400
- Adding BGP4 neighbors 400
- Encryption example 406
- Adding a BGP4 peer group 408
- Configuring a peer group 409
- Enabling next-hop recursion 417
- Support for RFC 4456 425
- Configuring confederations 426
- Commands for device A 428
- Commands for device B 428
- Commands for device C 428
- Commands for device D 428
- Configuring BGP4 restart 429
- BGP4 null0 routing 431
- Configuration examples 432
- Redistributing RIP routes 435
- Redistributing static routes 436
- Redistributing IBGP routes 436
- Filtering 437
- Using regular expressions 438
- BGP4 filtering communities 440
- Defining a community ACL 441
- Defining route maps 443
- Match examples using ACLs 445
- Matching based on interface 448
- Sending and receiving ORFs 452
- Enabling AS4 numbers 454
- Global AS4 configuration 455
- AS4 notation 457
- BGP4 AS4 attribute errors 458
- Generating traps for BGP4 464
- Configuring BGP4 464
- BGP route reflector 466
- BGP4 max-as error messages 471
- Originating the default route 471
- Dynamic route filter update 475
- Filter update delay and BGP 476
- Displaying BGP4 information 477
- Displaying advertised routes 491
- Displaying the best routes 492
- Displaying route details 499
- Displaying AS4 details 506
- Attribute entries 513
- Running configuration 514
- Using soft reconfiguration 517
- Dynamically refreshing routes 520
- Clearing traffic counters 523
- Clearing diagnostic buffers 523
- Configuring BGP4+ 525
- Enabling BGP4+ 527
- Adding BGP4+ neighbor 528
- Configuring a route map 529
- Creating a BGP4+ peer group 530
- Importing routes into BGP4+ 532
- Using route maps 534
- Clearing BGP4+ information 537
- Displaying BGP4+ information 541
- Total number of BGP Routes: 4 547
- Displaying BGP4+ summary 580
- VRRP and VRRP-E 585
- Overview 586
- VRRP and VRRP-E overview 586
- Virtual router ID 588
- Virtual router MAC address 588
- Virtual router IP address 589
- Master negotiation 589
- Hello messages 590
- VRRP-E overview 591
- ARP behavior with VRRP-E 593
- Comparison of VRRP and VRRP-E 594
- VRRP and VRRP-E parameters 595
- Configuration rules for VRRP 599
- Configuring IPv4 VRRP-E 604
- Configuring IPv6 VRRP-E 604
- Configuring Switch 1 606
- VRRP syntax 606
- VRRP-E syntax 606
- VRRP router type 607
- Hello interval configuration 609
- Dead interval configuration 610
- Track port configuration 611
- Track priority configuration 611
- Backup preempt configuration 612
- Changing the timer scale 612
- VRRP-E slow start timer 613
- Displaying statistics 627
- VRRP example 632
- VRRP-E example 633
- Configuring Multi-VRF 635
- Multi-VRF Overview 637
- Configuring VRF instances 642
- Removing a Multi-VRF instance 644
- Configuring Management VRFs 645
- SNMP server 646
- SNMP trap generator 646
- SSH server 646
- Telnet client 646
- RADIUS client 647
- TACACS+ client 647
- Configuration notes 649
- Proxy ARP and Local Proxy ARP 653
- ARP rate-limiting 653
- Assigning loopback interfaces 655
- Multi-VRF Show commands 655
- Step 2: Configuring VRFs 660
- Layer 3 Routing Commands 663
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