Hi guys
Thanks for a great resource!
I've set up an SP lab where i am right now working on an SR setup. This is all virtual running the following images:
- Cisco IOS XR Software, Version 7.4.1
- CSR1000V - Cisco IOS XE Software, Version 17.03.02
- ISRV - Cisco IOS XE Software, Version 17.03.03
The diagram below shows a bit of the parts of the lab that i am currently working on, for context.
So, ISPs 2 and 4 are up and running as described in their respective white text boxes. Traffic is exchanged across the Option C link between them. I have connectivity in the simulated vrf Internet between devices 4-ISP-7 (Lo47) and Internet (1.1.1.1). As seen in the following trace:
4-ISP-7#traceroute vrf Internet 1.1.1.1 source lo47
Type escape sequence to abort.
Tracing the route to 1.1.1.1
VRF info: (vrf in name/id, vrf out name/id)
1 10.4.37.3 [MPLS: Labels 40005/19/2302 Exp 0] 21 msec
10.4.47.4 [MPLS: Labels 40005/19/2302 Exp 0] 18 msec
10.4.37.3 [MPLS: Labels 40005/19/2302 Exp 0] 4 msec
2 10.4.46.6 [MPLS: Labels 40005/19/2302 Exp 0] 5 msec
10.4.23.2 [MPLS: Labels 40005/19/2302 Exp 0] 17 msec
10.4.46.6 [MPLS: Labels 40005/19/2302 Exp 0] 3 msec
3 10.4.25.5 [MPLS: Labels 19/2302 Exp 0] 41 msec
10.4.56.5 [MPLS: Labels 19/2302 Exp 0] 5 msec
10.4.25.5 [MPLS: Labels 19/2302 Exp 0] 3 msec
4 172.1.2.1 [MPLS: Label 2302 Exp 0] 3 msec 2 msec 3 msec
5 172.1.2.0 4 msec * 4 msec
What troubles me is this. There is no connectivity from 4-ISP-3 to the Internet router. I have routing entries both in the vrf and in the underlay and yet i get this when i look in the fib:
RP/0/RP0/CPU0:4-ISP-3#sh ip cef vrf Internet 1.1.1.1
Wed Dec 13 05:32:57.267 UTC
1.1.1.1/32, version 19, drop adjacency, internal 0x5000001 0x30 (ptr 0xebae450) [1], 0x600 (0xed4c0b0), 0xa08 (0xeea47d8)
Updated Dec 13 03:49:50.467
Prefix Len 32, traffic index 0, precedence n/a, priority 3
gateway array (0xebb4318) reference count 5, flags 0x3a, source rib (7), 0 backups
[6 type 1 flags 0x88401 (0xeee78e8) ext 0x0 (0x0)]
LW-LDI[type=1, refc=1, ptr=0xed4c0b0, sh-ldi=0xeee78e8]
gateway array update type-time 3 Dec 13 05:32:43.819
LDI Update time Dec 13 03:49:50.467
LW-LDI-TS Dec 13 03:49:50.467
via 10.2.255.3/32, 0 dependencies, recursive [flags 0x6000]
path-idx 0 NHID 0x0 [0xd6643f8 0x0]
recursion-via-/32
next hop VRF - 'default', table - 0xe0000000
unresolved
labels imposed {2302}
Load distribution: 0 (refcount 6)
Hash OK Interface Address
0 Y recursive drop The RIB looks okay imho:
RP/0/RP0/CPU0:4-ISP-3#sh ip route vrf Internet 1.1.1.1
Wed Dec 13 06:22:35.759 UTC
Routing entry for 1.1.1.1/32
Known via "bgp 4", distance 200, metric 0
Tag 2, type internal
Installed Dec 13 03:49:50.460 for 02:32:45
Routing Descriptor Blocks
10.2.255.3, from 10.4.255.6
Nexthop in Vrf: "default", Table: "default", IPv4 Unicast, Table Id: 0xe0000000
Route metric is 0
No advertising protos.
The underlay looks good across the Option C:
RP/0/RP0/CPU0:4-ISP-3#ping 10.2.255.3 sour lo 0
Wed Dec 13 06:24:14.285 UTC
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.2.255.3, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 3/4/8 ms
RP/0/RP0/CPU0:4-ISP-3#sh ip route 10.2.255.3
Wed Dec 13 06:24:23.325 UTC
Routing entry for 10.2.255.3/32
Known via "bgp 4", distance 200, metric 0
Tag 2, type internal
Installed Dec 11 00:01:58.824 for 2d06h
Routing Descriptor Blocks
10.4.255.5, from 10.4.255.6
Route metric is 0
No advertising protos.
Again, the XE box 4-ISP-7, has connectivity in the Internet vrf. I need help to figure out why the FIB entry is a drop adj...
Any ideas appreciated!
Thanks and have a great weekend.
Cheers
