Re: [nsp] Maximum sub-interfaces per port

From: Sean Crocker (crockers@mail.trinicom.com)
Date: Thu May 02 2002 - 16:16:57 EDT

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>The only limitation is on the number of IDBs the platform/version supports;
>you can distribute those IDBs however you wish.

Also, some recent IOS version will tell you the maximum number of IDBs:

Wellfleet#sh idb

Maximum number of IDBs 4096

14 SW IDBs allocated (2392 bytes each)

13 HW IDBs allocated (5640 bytes each)
HWIDB#1 1 SRP0/0 (HW IFINDEX, SRP, HW_LAYOUT)
HWIDB#2 2 GigabitEthernet3/0 (HW IFINDEX, Ether)
HWIDB#3 3 GigabitEthernet3/1 (HW IFINDEX, Ether)
HWIDB#4 4 GigabitEthernet3/2 (HW IFINDEX, Ether)
HWIDB#5 5 GigabitEthernet3/3 (HW IFINDEX, Ether)
HWIDB#6 6 GigabitEthernet3/4 (HW IFINDEX, Ether)
HWIDB#7 7 GigabitEthernet3/5 (HW IFINDEX, Ether)
HWIDB#8 8 GigabitEthernet3/6 (HW IFINDEX, Ether)
HWIDB#9 9 GigabitEthernet3/7 (HW IFINDEX, Ether)
HWIDB#10 10 GigabitEthernet3/8 (HW IFINDEX, Ether)
HWIDB#11 11 GigabitEthernet3/9 (HW IFINDEX, Ether)
HWIDB#12 12 Loopback0 (HW IFINDEX)
HWIDB#13 13 Ethernet0 (HW IFINDEX, Ether)

Wellfleet#

Sean

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