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New Member

Cannot create VLAN


I am trying to create a vlan on a 6509.

cc_6509_02(vlan)#vlan 1082 name ABC

It doesn't seem to like a number over 1009. I know you can create vlans up to 4096. I tried to create it from the config t prompt using vlan 1082 name ABC and this seems to work. I don't get an error but when I run show vlans I don't see it. BTW: I am setup in transparent mode for VTP.



bjw Silver

Re: Cannot create VLAN


THere are a couple of possible reasons for this.

extended system ID must be enabled, and there's an old TAC case where mac-reduction must be enabled;



New Member

Re: Cannot create VLAN

Thanks for the links... It sounds like I can't use a vlan over 1000 as a regular vlan. Is that a correct statement on my part? BTW: I am running IOS not CATOS

many thanks

New Member

Re: Cannot create VLAN

Layer 3 ports and some software features require internal VLANs. Internal VLANs are allocated from 1006 and up. You cannot use a VLAN that has been allocated for such use. To display the VLANs used internally, enter the show vlan internal usage command.

Switches running Catalyst product family software do not support configuration of VLANs 1006-1024. If you configure VLANs 1006-1024, ensure that the VLANs do not extend to any switches running Catalyst product family software.

New Member

Re: Cannot create VLAN


I am running native IOS on my 6509 not CATOS. So bottom line... I guess I can use a vlan over 1000?


New Member

Re: Cannot create VLAN

Is 1009 used internally? (show vlan internal usage command)

New Member

Re: Cannot create VLAN

Most of them are in use... here is the output from the command:

show vlan internal usage

VLAN Usage

---- --------------------

1006 online diag vlan0

1007 online diag vlan1

1008 online diag vlan2

1009 online diag vlan3

1010 online diag vlan4

1011 online diag vlan5

1012 PM vlan process (trunk tagging)

1013 Control Plane Protection

1014 L3 multicast partial shortcuts for VPN 0

1015 Egress internal vlan

1016 Multicast VPN 0 QOS vlan

1017 IPv6 Multicast Egress multicast

1018 GigabitEthernet5/1

1019 GigabitEthernet5/2

1044 GigabitEthernet2/1

1045 GigabitEthernet2/2

1046 GigabitEthernet2/3

1047 GigabitEthernet2/4

1048 GigabitEthernet2/5

1049 GigabitEthernet2/6

VLAN Usage

---- --------------------

1050 GigabitEthernet2/7

1051 GigabitEthernet2/8

1052 GigabitEthernet2/9

1053 GigabitEthernet2/10

1054 GigabitEthernet2/11

1055 GigabitEthernet2/12

1056 GigabitEthernet2/13

1057 GigabitEthernet2/14

1058 GigabitEthernet2/15

1059 GigabitEthernet2/16

1060 GigabitEthernet2/17

1061 GigabitEthernet2/18

1062 GigabitEthernet2/19

1063 GigabitEthernet2/20

1064 GigabitEthernet2/21

1065 GigabitEthernet2/22

1066 GigabitEthernet2/23

1067 GigabitEthernet2/24

1068 GigabitEthernet2/25

1069 GigabitEthernet2/26

1070 GigabitEthernet2/27

1071 GigabitEthernet2/28

1072 GigabitEthernet2/29

VLAN Usage

---- --------------------

1073 GigabitEthernet2/30

1074 GigabitEthernet2/31

1075 GigabitEthernet2/32

1076 GigabitEthernet2/33

1077 GigabitEthernet2/34

1078 GigabitEthernet2/35

1079 GigabitEthernet2/36

1080 GigabitEthernet2/37

1081 GigabitEthernet2/38

1082 GigabitEthernet2/39

1083 GigabitEthernet2/40

1084 GigabitEthernet2/41

1085 GigabitEthernet2/42

1086 GigabitEthernet2/43

1087 GigabitEthernet2/44

1088 GigabitEthernet2/45

1089 GigabitEthernet2/46

1090 GigabitEthernet2/47

1091 GigabitEthernet2/48

1092 GigabitEthernet6/1

1093 GigabitEthernet6/2

1094 GigabitEthernet6/3

1095 GigabitEthernet6/4

VLAN Usage

---- --------------------

1096 GigabitEthernet6/5

1097 GigabitEthernet6/6

1098 GigabitEthernet6/7

1099 GigabitEthernet6/8

1100 GigabitEthernet6/9

1101 GigabitEthernet6/10

1102 GigabitEthernet6/11

1103 GigabitEthernet6/12

1104 GigabitEthernet6/13

1105 GigabitEthernet6/14

1106 GigabitEthernet6/15

1107 GigabitEthernet6/16

1108 GigabitEthernet6/17

1109 GigabitEthernet6/18

1110 GigabitEthernet6/19

1111 GigabitEthernet6/20

1112 GigabitEthernet6/21

1113 GigabitEthernet6/22

1114 GigabitEthernet6/23

1115 GigabitEthernet6/24

1116 GigabitEthernet6/25

1117 GigabitEthernet6/26

1118 GigabitEthernet6/27

VLAN Usage

---- --------------------

1119 GigabitEthernet6/28

1120 GigabitEthernet6/29

1121 GigabitEthernet6/30

1122 GigabitEthernet6/31

1123 GigabitEthernet6/32

1124 GigabitEthernet6/33

1125 GigabitEthernet6/34

1126 GigabitEthernet6/35

1127 GigabitEthernet6/36

1128 GigabitEthernet6/37

1129 GigabitEthernet6/38

1130 GigabitEthernet6/39

1131 GigabitEthernet6/40

1132 GigabitEthernet6/41

1133 GigabitEthernet6/42

1134 GigabitEthernet6/43

1135 GigabitEthernet6/44

1136 GigabitEthernet6/45

1137 GigabitEthernet6/46

1138 GigabitEthernet6/47

1139 GigabitEthernet6/48

1140 GigabitEthernet3/1

1141 GigabitEthernet3/2

VLAN Usage

---- --------------------

1142 GigabitEthernet3/3

1143 GigabitEthernet3/4

1144 GigabitEthernet3/5

1145 GigabitEthernet3/6

1146 GigabitEthernet3/7

1147 GigabitEthernet3/8

1148 GigabitEthernet3/9

1149 GigabitEthernet3/10

1150 GigabitEthernet3/11

1151 GigabitEthernet3/12

1152 GigabitEthernet3/13

1153 GigabitEthernet3/14

1154 GigabitEthernet3/15

1155 GigabitEthernet3/16

1156 GigabitEthernet3/17

1157 GigabitEthernet3/18

1158 GigabitEthernet3/19

1159 GigabitEthernet3/20

1160 GigabitEthernet3/21

1161 GigabitEthernet3/22

1162 GigabitEthernet3/23

1163 GigabitEthernet3/24

1164 GigabitEthernet3/25

Cisco Employee

Re: Cannot create VLAN


That's the correct way to configure the extended range vlans on the 6500 switch. You cannot configure the extended range vlans using the vlan database, it can only be configured in the global configuration mode. Please do a " wr mem" or " copy running-config startup-config " and check if you see it under the " show vlan".

-amit singh

Cisco Employee

Re: Cannot create VLAN


I see that vlan 1082 is already assigned to a routed port on the switch internally. Please follow the points below:

Each routed port on the switch creates an internal VLAN for its use. These internal VLANs

use extended-range VLAN numbers, and the internal VLAN ID cannot be used for an

extended-range VLAN. If you try to create an extended-range VLAN with a VLAN ID that is

already allocated as an internal VLAN, an error message is generated, and the command is rejected.

-Because internal VLAN IDs are in the lower part of the extended range, we recommend that

you create extended-range VLANs beginning from the highest number (4094) and moving to the

lowest (1006) to reduce the possibility of using an internal VLAN ID.

-Before configuring extended-range VLANs, enter the show vlan internal usage privileged EXEC command to see which VLANs have been allocated as internal VLANs.

-If necessary, you can shut down the routed port assigned to the internal VLAN, which

frees up the internal VLAN, and then create the extended-range VLAN and re-enable the port, which then uses another VLAN as its internal VLAN.

Extended-range VLAN configurations are not stored in the VLAN database, but because VTP mode is transparent, they are stored in the switch running configuration file, and you can save the configuration in the start-up configuration file by using the copy running-config startup-config privileged EXEC command.

You should be able to see the extended vlans when using " show run ".


-amit singh

New Member

Re: Cannot create VLAN


Thanks for the help...

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