Administrator Guide

Version Description
6.1.1.1 Introduced on the E-Series.
Usage
Information
The following describes the show ip ospf process-id database external command shown in
the following example.
Field Description
LS Age Displays the LSA’s age.
Options Displays the optional capabilities available on router. The following options can be
found in this item:
● TOS-capability or No TOS-capability is displayed depending on whether the
router can support Type of Service.
● DC or No DC is displayed depending on whether the originating router can
support OSPF over demand circuits.
● E or No E is displayed on whether the originating router can accept AS External
LSAs.
LS Type Displays the LSA’s type.
Link State ID Displays the Link State ID.
Advertising
Router
Identifies the router ID of the LSA’s originating router.
LS Seq Number Identifies the link state sequence number. This number enables you to identify old
or duplicate LSAs.
Checksum Displays the Fletcher checksum of the LSA’s complete contents.
Length Displays the length in bytes of the LSA.
Network Mask Displays the network mask implemented on the area.
Metrics Type Displays the external type.
TOS Displays the Type of Service (TOS) options. Option 0 is the only option.
Metric Displays the LSA metric.
Forward Address Identifies the address of the forwarding router. Data traffic is forwarded to this
router. If the forwarding address is 0.0.0.0, data traffic is forwarded to the
originating router.
External Route
Tag
Displays the 32-bit field attached to each external route. The OSPF protocol does
not use this field, but you can use the field for external route management.
Example
Dell#show ip ospf 1 database external
OSPF Router with ID (20.20.20.5) (Process ID 1)
Type-5 AS External
LS age: 612
Options: (No TOS-capability, No DC, E)
LS type: Type-5 AS External
Link State ID: 12.12.12.2
Advertising Router: 20.31.3.1
LS Seq Number: 0x80000007
Checksum: 0x4cde
Length: 36
Network Mask: /32
Metrics Type: 2
TOS: 0
Metrics: 25
Forward Address: 0.0.0.0
External Route Tag: 43
1198 Open Shortest Path First (OSPFv2 and OSPFv3)