FRR which acts as L1L2 ISIS Router doesn't append L1 routes to L2 database

[static33rus]

FRR version: 7.4
Scheme:
FRR1(L1) --- FRR2(L1L2) ---- FRR3(L2)
FRR1 advertises network 192.168.4.0/24, this network appeared in FRR2 RIB, but not in FRR3

FRR2 database:

FRR2# show isis database detail FRR1
Area 1:
IS-IS Level-1 link-state database:
LSP ID                  PduLen  SeqNumber   Chksum  Holdtime  ATT/P/OL
FRR1.00-00                 98   0x00000007  0xa5dd     698    0/0/0
  Protocols Supported: IPv4
  Area Address: 49.0001
  MT Router Info: ipv4-unicast
  MT Router Info: ipv6-unicast
  Hostname: FRR1
  TE Router ID: 192.168.4.1
  Router Capability: 192.168.4.1 , D:0, S:0
  Extended Reachability: 0000.0000.0002.02 (Metric: 10)
  IPv4 Interface Address: 192.168.4.1
  Extended IP Reachability: 192.168.2.0/24 (Metric: 10)
  Extended IP Reachability: 192.168.4.0/24 (Metric: 10)


FRR2# show isis database detail FRR2
Area 1:
IS-IS Level-1 link-state database:
LSP ID                  PduLen  SeqNumber   Chksum  Holdtime  ATT/P/OL
FRR2.00-00           *     98   0x00000006  0x0b7d     759    0/0/0
  Protocols Supported: IPv4
  Area Address: 49.0001
  MT Router Info: ipv4-unicast
  MT Router Info: ipv6-unicast
  Hostname: FRR2
  TE Router ID: 192.168.3.1
  Router Capability: 192.168.3.1 , D:0, S:0
      Algorithm: 0: SPF 0: SPF
  Extended Reachability: 0000.0000.0002.02 (Metric: 10)
  IPv4 Interface Address: 192.168.3.1
  Extended IP Reachability: 192.168.2.0/24 (Metric: 10)
  Extended IP Reachability: 192.168.3.0/24 (Metric: 10)

IS-IS Level-2 link-state database:
LSP ID                  PduLen  SeqNumber   Chksum  Holdtime  ATT/P/OL
FRR2.00-00           *     98   0x00000006  0xe1a5     761    0/0/0
  Protocols Supported: IPv4
  Area Address: 49.0001
  MT Router Info: ipv4-unicast
  MT Router Info: ipv6-unicast
  Hostname: FRR2
  TE Router ID: 192.168.3.1
  Router Capability: 192.168.3.1 , D:0, S:0
      Algorithm: 0: SPF 0: SPF
  Extended Reachability: 0000.0000.0001.02 (Metric: 10)
  IPv4 Interface Address: 192.168.3.1
  Extended IP Reachability: 192.168.2.0/24 (Metric: 10)
  Extended IP Reachability: 192.168.3.0/24 (Metric: 10)

As you can see on output above, FRR2 received route 192.168.4.0/24 from FRR1 in L1 LSP, but didn't append this route to L2 database and as a result FRR3 didn't receive this route

[winyannainghtut]

Is there any update about this issue ? I'm facing the same problem with the FRR v8.2.2

[kyrielucy]

I also encountered the problem that the l1l2 border router did not convert the l1 route to l2 lsp. Is there a fix?