Huawei Quidway NetEngine80E Configuration Manual page 719

HUAWEI NetEngine80E/40E Router
Configuration Guide - IP Routing
IPV4 Dest
Admin Tag
Priority
# Run the display fib 10.5.1.1 verbose command on Router A to check the forwarding entry
from Router A to Router D.
<RouterA> display fib 10.5.1.1 verbose
Route Entry Count: 1
Destination: 10.5.1.0
Nexthop
LocalAddr
Flags
ATIndex
LspFwdFlag : 0
InLabel
BGPNextHop : 0.0.0.0
QosInfo
NexthopBak : 0.0.0.0
LspTokenBak: 0x0
LspToken_ForInLabelBak : 0x0
EntryRefCount : 0
rt_ulVlanId : 0x0
LspType
MplsMtu
NextToken
Label_NextToken : 0
LspBfdState
As shown in the command output, the traffic from Router A to Router D is only forwarded
through Link T.
Step 4 Enable IS-IS Auto FRR on Router A, and then check the routing information.
# Enable IS-IS Auto FRR on Router A.
[RouterA] isis
[RouterA-isis-1] frr
[RouterA-isis-1-frr]loop-free-alternate
# Check information about the link from Router A to Router D. You can find that IS-IS creates
a backup link because IS-IS Auto FRR is enabled.
<RouterA> display isis route 10.5.1.1 verbose
IPV4 Dest
Admin Tag
Priority
NextHop
Issue 02 (2014-09-30)
Flags: D-Direct, A-Added to URT, L-Advertised in LSPs, S-IGP Shortcut,
ISIS(1) Level-2 Forwarding Table
--------------------------------
: 10.5.1.0/24
: -
: Low
Flags: D-Direct, A-Added to URT, L-Advertised in LSPs, S-IGP Shortcut,
: 10.1.0.2
: 10.1.0.1
: DGU
: 0
: NULL
: 0x0
: 0
: 0
: 0
: 0
Route information for ISIS(1)
-----------------------------
ISIS(1) Level-1 Forwarding Table
--------------------------------
: 10.5.1.0/24
: -
: Low
:
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U-Up/Down Bit Set
Int. Cost : 30
Src Count : 3
U-Up/Down Bit Set
Mask : 255.255.255.0
OutIf : GigabitEthernet1/0/0
LocalMask: 0.0.0.0
Age : 26sec
Slot : 0
LspToken : 0x0
OriginAs : 0
PeerAs : 0
OriginQos: 0x0
OutIfBak : [No Intf]
InLabelBak : NULL
Label_ForLspTokenBak
Gateway_ForLspTokenBak : 0
IfIndex_ForLspTokenBak : 0
Label : 0
Int. Cost : 30
Src Count : 1
Interface :
7 IS-IS Configuration
Ext. Cost : NULL
Flags : -/-/-/-
: 0
Ext. Cost : NULL
Flags : A/-/L/-
ExitIndex :
694