LDP Configuration Commands
751
route-tag
Syntax
route-tag
tag-number
undo route-tag
View
OSPF protocol view
Parameter
tag-number
: Tag value to identify VPN import route, in the range of 0 to
4294967295. By default, its first two bytes are fixed to 0xD000, while the last two
bytes are the ASN of local BGP. For example, if the local BGP ASN is 100, then the
default tag value in decimal is 3489661028. The value is an integer from 0 to
4294967295.
Description
Use the
route-tag
command to specify a tag value to identify VPN import route.
Use the
undo route-tag
command to restore the default value.
If a VPN Site is linked to multiple PEs, when a route learned from MPLS/BGP is
advertised by a PE router via its type-5 or type-7 LSA to the VPN Site, the route
may be received by another PE router. This will result in routing loop. To avoid
routing loop, you should configure Route-tag and you are recommended to
configure the same route-tag for the PEs in the same VPN domain. The Route-tag
is included in the type-5/-7 LSA. It is not transmitted in the extended community
attributes of BGP, and thus it is limited in the local area. Therefore, it can only be
configured and function on the PE router which receives BGP routes and generates
OSPF LSA.
Configure Route-tag in OSPF protocol view. Different processes can be configured
with a same Route-tag. You can configure the same Route-tag using different
commands, but they are different in priority.
■
Those configured with the
import-route
command are of the highest priority.
■
Those configured with the
route-tag
command are in the second place in
terms of priority.
■
Those configure with the
default tag
command are of the lowest priority.
If the Tag included in the type-5/-7 LSA is identical with its existing Tag, the LSA
received will be neglected in route calculation.
c
CAUTION:
The Route-tag configured will not be validated until the
reset ospf
command is executed.
Related command:
import-route
and
default
.
Example
# Configure Route-tag 100 to OSPF process 100.
[3Com-ospf-100] route-tag 100
OSPF: Process 100’s route tag has been changed
Summary of Contents for Switch 8807
Page 30: ......
Page 68: ...66 CHAPTER 2 COMMANDS USED TO LOG IN TO SWITCH ...
Page 78: ...76 CHAPTER 3 CONFIGURATION FILE MANAGEMENT COMMANDS ...
Page 96: ...94 CHAPTER 5 SUPER VLAN CONFIGURATION COMMANDS ...
Page 122: ...120 CHAPTER 8 IP PERFORMANCE CONFIGURATION COMMANDS ...
Page 130: ...128 CHAPTER 9 GARP GVRP CONFIGURATION COMMANDS ...
Page 162: ...160 CHAPTER 11 ETHERNET LINK AGGREGATION CONFIGURATION COMMANDS ...
Page 212: ...210 CHAPTER 13 MSTP CONFIGURATION COMMANDS ...
Page 234: ...232 CHAPTER 16 ACL COMMANDS ...
Page 282: ...280 CHAPTER 18 ACL CONTROL COMMANDS TO CONTROL LOGIN USERS ...
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Page 294: ...292 CHAPTER 19 VLAN ACL CONFIGURATION COMMANDS ...
Page 310: ...308 CHAPTER 20 802 1X CONFIGURATION COMMANDS ...
Page 370: ...368 CHAPTER 21 AAA AND RADIUS HWTACACS PROTOCOL CONFIGURATION COMMANDS ...
Page 398: ...396 CHAPTER 23 STATIC ROUTE CONFIGURATION COMMANDS ...
Page 462: ...460 CHAPTER 25 OSPF CONFIGURATION COMMANDS ...
Page 498: ...496 CHAPTER 26 INTEGRATED IS IS CONFIGURATION COMMANDS ...
Page 548: ...546 CHAPTER 27 BGP CONFIGURATION COMMANDS ...
Page 570: ...568 CHAPTER 30 RECURSIVE ROUTING CONFIGURATION ...
Page 584: ...582 CHAPTER 32 MULTICAST VLAN CONFIGURATION COMMANDS ...
Page 600: ...598 CHAPTER 33 MULTICAST COMMON CONFIGURATION COMMANDS ...
Page 604: ...602 CHAPTER 34 STATIC MULTICAST MAC ADDRESS CONFIGURATION COMMAND ...
Page 656: ...654 CHAPTER 37 MSDP CONFIGURATION COMMANDS ...
Page 682: ...680 CHAPTER 38 MBGP MULTICAST EXTENSION CONFIGURATION COMMANDS ...
Page 762: ...760 CHAPTER 40 BGP MPLS VPN CONFIGURATION COMMANDS ...
Page 808: ...806 CHAPTER 44 HA CONFIGURATION COMMANDS_HA_CONFIGURATION ...
Page 820: ...818 CHAPTER 45 ARP CONFIGURATION COMMANDS ...
Page 824: ...822 CHAPTER 46 ARP TABLE SIZE CONFIGURATION COMMANDS max arp entry config of slot 13 8192 ...
Page 862: ...860 CHAPTER 47 DHCP CONFIGURATION COMMANDS ...
Page 870: ...868 CHAPTER 48 DNS CONFIGURATION COMMANDS ...
Page 972: ...970 CHAPTER 56 SSH TERMINAL SERVICE CONFIGURATION COMMANDS ...
Page 982: ...980 CHAPTER 57 FILE SYSTEM MANAGEMENT COMMANDS ...
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