Each sticky ECMP route uses 64 distribution buckets to apportion flows onto the available next hops. Figure: Sticky ECMP flow distribution as next hops are removed part 1, Figure: Sticky ECMP flow distribution as next hops are removed part 2, and Figure: Sticky ECMP flow distribution as next hops are removed part 3 provide an example of the distribution of flows over multiple BGP next hops as next hops are removed.
Table: Sticky ECMP flow distribution as next hops are removed for 1.1.1.1/32 lists the sticky ECMP flow distribution as next hops are removed for 1.1.1.1/32.
| Initial sticky ECMP distribution for 1.1.1.1/32 in Figure: Sticky ECMP flow distribution as next hops are removed part 1 | ECMP distribution for 1.1.1.1/32 if next hop 3 fails in Figure: Sticky ECMP flow distribution as next hops are removed part 2 | ECMP distribution for 1.1.1.1/32 if next hop 2 subsequently fails in Figure: Sticky ECMP flow distribution as next hops are removed part 3 | |||
|---|---|---|---|---|---|
| Bucket | NH | Bucket | NH | Bucket | NH |
|
00 |
1 |
00 |
1 |
00 |
1 |
|
01 |
2 |
01 |
2 |
01 |
1 |
|
02 |
3 |
02 |
1 |
02 |
1 |
|
03 |
1 |
03 |
1 |
03 |
1 |
|
04 |
2 |
04 |
2 |
04 |
1 |
|
05 |
3 |
05 |
2 |
05 |
1 |
|
06 |
1 |
06 |
1 |
06 |
1 |
|
07 |
2 |
07 |
2 |
07 |
1 |
|
08 |
3 |
08 |
1 |
08 |
1 |
|
09 |
1 |
09 |
1 |
09 |
1 |
|
10 |
2 |
10 |
2 |
10 |
1 |
|
11 |
3 |
11 |
2 |
11 |
1 |
|
12 |
1 |
12 |
1 |
12 |
1 |
|
13 |
2 |
13 |
2 |
13 |
1 |
|
14 |
3 |
14 |
1 |
14 |
1 |
|
15 |
1 |
15 |
1 |
15 |
1 |
|
16 |
2 |
16 |
2 |
16 |
1 |
|
17 |
3 |
17 |
2 |
17 |
1 |
|
18 |
1 |
18 |
1 |
18 |
1 |
|
19 |
2 |
19 |
2 |
19 |
1 |
|
20 |
3 |
20 |
1 |
20 |
1 |
|
21 |
1 |
21 |
1 |
21 |
1 |
|
22 |
2 |
22 |
2 |
22 |
1 |
|
23 |
3 |
23 |
2 |
23 |
1 |
|
24 |
1 |
24 |
1 |
24 |
1 |
|
25 |
2 |
25 |
2 |
25 |
1 |
|
26 |
3 |
26 |
1 |
26 |
1 |
|
27 |
1 |
27 |
1 |
27 |
1 |
|
28 |
2 |
28 |
2 |
28 |
1 |
|
29 |
3 |
29 |
2 |
29 |
1 |
|
30 |
1 |
30 |
1 |
30 |
1 |
|
31 |
2 |
31 |
2 |
31 |
1 |
|
32 |
3 |
32 |
1 |
32 |
1 |
|
33 |
1 |
33 |
1 |
33 |
1 |
|
34 |
2 |
34 |
2 |
34 |
1 |
|
35 |
3 |
35 |
2 |
35 |
1 |
|
36 |
1 |
36 |
1 |
36 |
1 |
|
37 |
2 |
37 |
2 |
37 |
1 |
|
38 |
3 |
38 |
1 |
38 |
1 |
|
39 |
1 |
39 |
1 |
39 |
1 |
|
40 |
2 |
40 |
2 |
40 |
1 |
|
41 |
3 |
41 |
2 |
41 |
1 |
|
42 |
1 |
42 |
1 |
42 |
1 |
|
43 |
2 |
43 |
2 |
43 |
1 |
|
44 |
3 |
44 |
1 |
44 |
1 |
|
45 |
1 |
45 |
1 |
45 |
1 |
|
46 |
2 |
46 |
2 |
46 |
1 |
|
47 |
3 |
47 |
2 |
47 |
1 |
|
48 |
1 |
48 |
1 |
48 |
1 |
|
49 |
2 |
49 |
2 |
49 |
1 |
|
50 |
3 |
50 |
1 |
50 |
1 |
|
51 |
1 |
51 |
1 |
51 |
1 |
|
52 |
2 |
52 |
2 |
52 |
1 |
|
53 |
3 |
53 |
2 |
53 |
1 |
|
54 |
1 |
54 |
1 |
54 |
1 |
|
55 |
2 |
55 |
2 |
55 |
1 |
|
56 |
3 |
56 |
1 |
56 |
1 |
|
57 |
1 |
57 |
1 |
57 |
1 |
|
58 |
2 |
58 |
2 |
58 |
1 |
|
59 |
3 |
59 |
2 |
59 |
1 |
|
60 |
1 |
60 |
1 |
60 |
1 |
|
61 |
2 |
61 |
2 |
61 |
1 |
|
62 |
3 |
62 |
1 |
62 |
1 |
|
63 |
1 |
63 |
1 |
63 |
1 |
Figure: Sticky ECMP flow distribution as next hops are added part 1, Figure: Sticky ECMP flow distribution as next hops are added part 2, and Figure: Sticky ECMP flow distribution as next hops are added part 3 provide an example of the distribution of flows over multiple BGP next hops as next hops are added.
The following table lists the sticky ECMP flow distribution as next hops are added for 1.1.1.1/32:
| Initial sticky ECMP distribution for 1.1.1.1/32 in Figure: Sticky ECMP flow distribution as next hops are added part 1 | ECMP distribution for 1.1.1.1/32 if next hop 2 becomes available in Figure: Sticky ECMP flow distribution as next hops are added part 2 | ECMP distribution for 1.1.1.1/32 if next hop 3 additionally becomes available in Figure: Sticky ECMP flow distribution as next hops are added part 3 | |||
|---|---|---|---|---|---|
| Bucket | NH | Bucket | NH | Bucket | NH |
|
00 |
1 |
00 |
1 |
00 |
1 |
|
01 |
1 |
01 |
2 |
01 |
2 |
|
02 |
1 |
02 |
1 |
02 |
3 |
|
03 |
1 |
03 |
2 |
03 |
2 |
|
04 |
1 |
04 |
1 |
04 |
1 |
|
05 |
1 |
05 |
2 |
05 |
3 |
|
06 |
1 |
06 |
1 |
06 |
1 |
|
07 |
1 |
07 |
2 |
07 |
2 |
|
08 |
1 |
08 |
1 |
08 |
3 |
|
09 |
1 |
09 |
2 |
09 |
2 |
|
10 |
1 |
10 |
1 |
10 |
1 |
|
11 |
1 |
11 |
2 |
11 |
3 |
|
12 |
1 |
12 |
1 |
12 |
1 |
|
13 |
1 |
13 |
2 |
13 |
2 |
|
14 |
1 |
14 |
1 |
14 |
3 |
|
15 |
1 |
15 |
2 |
15 |
2 |
|
16 |
1 |
16 |
1 |
16 |
1 |
|
17 |
1 |
17 |
2 |
17 |
3 |
|
18 |
1 |
18 |
1 |
18 |
1 |
|
19 |
1 |
19 |
2 |
19 |
2 |
|
20 |
1 |
20 |
1 |
20 |
3 |
|
21 |
1 |
21 |
2 |
21 |
2 |
|
22 |
1 |
22 |
1 |
22 |
1 |
|
23 |
1 |
23 |
2 |
23 |
3 |
|
24 |
1 |
24 |
1 |
24 |
1 |
|
25 |
1 |
25 |
2 |
25 |
2 |
|
26 |
1 |
26 |
1 |
26 |
3 |
|
27 |
1 |
27 |
2 |
27 |
2 |
|
28 |
1 |
28 |
1 |
28 |
1 |
|
29 |
1 |
29 |
2 |
29 |
3 |
|
30 |
1 |
30 |
1 |
30 |
1 |
|
31 |
1 |
31 |
2 |
31 |
2 |
|
32 |
1 |
32 |
1 |
32 |
3 |
|
33 |
1 |
33 |
2 |
33 |
2 |
|
34 |
1 |
34 |
1 |
34 |
1 |
|
35 |
1 |
35 |
2 |
35 |
3 |
|
36 |
1 |
36 |
1 |
36 |
1 |
|
37 |
1 |
37 |
2 |
37 |
2 |
|
38 |
1 |
38 |
1 |
38 |
3 |
|
39 |
1 |
39 |
2 |
39 |
2 |
|
40 |
1 |
40 |
1 |
40 |
1 |
|
41 |
1 |
41 |
2 |
41 |
3 |
|
42 |
1 |
42 |
1 |
42 |
1 |
|
43 |
1 |
43 |
2 |
43 |
2 |
|
44 |
1 |
44 |
1 |
44 |
3 |
|
45 |
1 |
45 |
2 |
45 |
2 |
|
46 |
1 |
46 |
1 |
46 |
1 |
|
47 |
1 |
47 |
2 |
47 |
3 |
|
48 |
1 |
48 |
1 |
48 |
1 |
|
49 |
1 |
49 |
2 |
49 |
2 |
|
50 |
1 |
50 |
1 |
50 |
3 |
|
51 |
1 |
51 |
2 |
51 |
2 |
|
52 |
1 |
52 |
1 |
52 |
1 |
|
53 |
1 |
53 |
2 |
53 |
3 |
|
54 |
1 |
54 |
1 |
54 |
1 |
|
55 |
1 |
55 |
2 |
55 |
2 |
|
56 |
1 |
56 |
1 |
56 |
3 |
|
57 |
1 |
57 |
2 |
57 |
2 |
|
58 |
1 |
58 |
1 |
58 |
1 |
|
59 |
1 |
59 |
2 |
59 |
3 |
|
60 |
1 |
60 |
1 |
60 |
1 |
|
61 |
1 |
61 |
2 |
61 |
2 |
|
62 |
1 |
62 |
1 |
62 |
3 |
|
63 |
1 |
63 |
2 |
63 |
2 |